Google Calendar is useful for me to have reminders and also to organize things with family. The functionality of adding people's emails, automatically send them

Google Calendar is useful for me to have reminders and also to organize things with family. The functionality of adding people's emails, automatically send them a request of that event, letting them answer if they are gonna go or not, and adding in their personal calendars that event, is just priceless. For to-do list, shopping lists, ideas, and other small things, I always use paper and pen. I don't usually carry any of this around except shopping lists (to cross out articles already bought), but if I had to, I'll bought a Moleskine or similar to carry around. For projects where there are others than me involved, or for projects that have a bigger size, Trello (or any other card-style list manager) is the best to use. It let you order ideas, to-do items, parts, or any other divisible list of things in the way you like. For example: - Ideas, To do, To check, Completed - Alice, Bob, Carol, Dave, DONE - General, Minimal, Failsafe, UX, Maintenance