📋 Lesson 2.2: Checklists, Due Dates & Reminders

Checklists: One Card, Many Steps

A checklist is a list of sub-tasks that lives inside a card. It's the answer to the constant tension in Trello: you don't want a hundred tiny cards cluttering the board, but you also don't want a card called "Book the venue" that secretly hides eight separate to-dos. Checklists let one card stay one card on the board while holding all its steps inside.

Let's plan a wedding for this module — a project with plenty of multi-step cards and a very hard deadline. Open the "Book the venue" card and add a checklist:

Venue booking — a checklist
☑️ Shortlist 3 venues
☑️ Tour each one
☐ Compare quotes
☐ Sign the contract
☐ Pay the deposit

As you tick items, Trello shows a progress bar and a percentage at the top of the checklist — "2/5 · 40%." That little bar is quietly motivating: you can see a card getting done, even before it leaves the list. A card can hold more than one checklist too (e.g. "Venue" and "Catering" on a bigger card), each with its own name and progress.

Quick moves worth knowing

• Add many items fast: paste a list and Trello can split each line into its own item.
• Reorder items by dragging; rename by clicking.
• Hide checked items with a toggle, so a long finished list collapses to just what's left.
• Delete the whole checklist when it has served its purpose — the card stays.

Converting an Item into a Card

Checklist items and cards aren't a one-way street. When an item outgrows the checklist — say "Sign the contract" turns out to need its own deadline, a comment thread with your partner, and an attachment of the signed PDF — you can convert it into a card in one click. Trello moves it onto the board as a full card and leaves a neat link behind so you don't lose the thread.

This is the healthy rhythm of a Trello board: small stuff stays as checklist items; anything that needs its own life graduates to a card. You're not deciding forever on day one — you promote items to cards as reality demands. It keeps the board honest without keeping it cluttered.

Advanced Checklists: Assignees & Item Dates Standard

Plain checklists are on every plan, including Free. But paid plans add advanced checklists, which let you attach two things to an individual checklist item: a member (who's doing just that step) and a due date (when just that step is due). This unlocks on Standard and up.

Why it matters: on a shared wedding board, "Catering" might be one card with a checklist where each item belongs to a different person and has its own deadline:

Catering — advanced checklist
☑️ Book tasting · 👤 Alex · due Apr 2
☐ Finalize menu · 👤 Sam · due Apr 15
☐ Confirm headcount · 👤 Alex · due May 1
☐ Pay balance · 👤 Sam · due May 20

An item's due date can even show up on the assignee's own dashboard and calendar views, so advanced checklists turn a single card into a mini project plan without spawning a card per step.

Start Dates, Due Dates & Reminders

Click Dates on a card and you can set a start date, a due date, or both — plus a reminder. Each does a distinct job:

• Due date — when it needs to be finished. This is the one that drives badges, calendar views, and reminders.
• Start date — when work should begin. Most useful with Timeline/Calendar views (Module 4) to show a card as a span, not a single point.
• Reminder — how far ahead of the due date Trello nudges you: at the time, 5 minutes before, an hour, a day, two days before. (You can also set "None.")

The due-complete state

A due date has a checkbox next to it. When you tick it, the date turns green and the card is marked "complete" — distinct from being in a "Done" list. This matters because a card can be finished (due-complete) while still sitting in "In Progress," and views/automations can key off that complete flag. Marking a due date complete is a tiny, satisfying ritual that also keeps your calendar clean of ghosts.

Here's how a due date changes color as time passes — the visual language you'll come to read instantly:

• Yellow badge — due soon (within ~24 hours).
• Red badge — overdue.
• Green badge — marked complete.
• Grey/neutral — due further out.

How Dates & Checklists Show as Badges

Everything you just set inside the card surfaces on the board front as tiny badges, so you get the status without opening a thing. This is the payoff: the detail lives inside the card, but the signal lives on the board. Here's the wedding board with badges telling the whole story at a glance:

Read it like a dashboard: "Send save-the-dates" is overdue and 0/3 — a red flag you'd never spot in a flat list. "Book the venue" is due Apr 4, 2/5 done. "Set the date" is complete (green ✓) with its checklist fully ticked. That's your whole project's health in one glance.

🎯 Project: Make a Card That Won't Slip

Let's take one genuinely multi-step card and give it the full treatment — a checklist, dates, and a reminder — until its board badges tell the whole story. Use your Wedding / Event Planning board if you're building along, or apply this to any real card with clear sub-steps and a deadline (a trip, a launch, a big errand).

Card: Send save-the-dates
Due: Apr 4   Reminder: 1 day before

Checklist "Save-the-dates" (0/4)
- Finalize the guest list
- Choose a design
- Collect mailing addresses
- Order & mail

→ Convert "Choose a design" to its own card
  (it needs a designer + approval thread)

Best Practices for Checklists & Dates

✅ Do's

• Use checklists for steps, cards for work. Sub-steps that share one deadline and owner belong in a checklist; anything needing its own live promotes to a card.
• Set a reminder on anything that truly can't slip. A colored badge is passive; a reminder actually pings you.
• Mark due dates complete. It keeps your calendar and views honest, and it feels good.

❌ Don'ts

• Don't build monster checklists. A 30-item list is a project pretending to be a card — split it into cards or checklists per phase.
• Don't confuse "in a Done list" with "due complete." They're separate; a card can be one without the other.
• Don't assume reminders fire on their own. Check your notification channels (Lesson 7.2), especially for deadlines with money attached.

📓 Learning Journal

📝 Lesson Summary

🎉 What You've Accomplished

You can now take a vague, one-line card and turn it into a plan with steps, deadlines, and nudges — and read a whole project's health from the badges alone. This is the difference between a board that looks nice and a board you actually trust to catch things before they slip.

❓ Common Questions at This Stage

🔭 Looking Ahead

Next we add the other half of at-a-glance meaning: labels. You'll color-code cards by category or priority, then slice a busy board with filters and find anything with search — including how covers and labels finally stop being confused for each other.

✅ Before the Next Lesson

• Add a checklist and a due date to at least one real card
• Set one reminder on a deadline that genuinely matters to you
• Write your Learning Journal entry — the near-miss deadline and the card that would have caught it

📚 Additional Resources

• Trello Guide — official getting-started docs
• Trello Support — checklists, dates & reminders
• trello.com/pricing — what advanced checklists need (as of early 2026)