I use Things to manage todo's with a deadline. Sometimes I put it in my calendar.

Overall, I try to avoid having tasks with deadlines 😄

I put things with a deadline in my calendar on the day I want to get them done

For everything else, I keep a backlog in Notion

I use Reminders app that comes with iOS/MacOS. Only missing feature is the annoying alert sound :D

Keep it simple, using Reminders on iOS. But it doesn't have annoying alert sound

Google Calendar

i use the default one on macos. It syncs across all devices so I'll get the reminder on my iphone, applewatch, and macbook.

super simple

I keep it simple.
< 24 h, I use the alarm
> 24 h, I use the calendar

Google Calendar - timeboxing, reminders, etc
TickTick - random reminders, grocery checklist, etc
Notion/Obsidian - reviews, planning, backlogs

Big fan of Todoist, they also recently released a "Deadlines" feature - todoist.com/help/articles/int…

My stack looks like:

• SkedPal: I use it to organize everything, and I love that it has a feature to create time zones for specific types of tasks. You can schedule reminders for tasks, and there's a "today" and "this week" section so you can see tasks as they pop up. You can set tasks as recurring as well. Another favorite feature is it tells me when I'm being delusional about what I can accomplish and will alert me if it can't schedule something, so I can revise my plan or stop committing to things.

• Basecamp: Specifically for client portals, though. All the tasks are reflected in Skedpal, but I use Basecamp to keep clients in the loop about things. If what you need to manage involves other people (clients, business partners, collabs, etc), this could be a good solution since you can schedule out reminders and create recurring tasks everyone can see.

• BlitzIt: Newest addition to my stack. I love it because I can put my tasks in there and have a space to add more tasks to the backlog, then drag them over to the "this week" and "today" columns. It's like Trello in this way. I also love it because it functions as a way to stay on track with each task and tests to see if I'm realistic about how long certain tasks take. (I'm never realistic.) There's also a "focus" setting that stays on the screen and it beeps every 15 minutes (you can change this) to remind me to refocus if my mind wandered. It has the option for recurring tasks, but I haven't used it long enough to test that feature yet.

I am using Obsidian with the Calendar plugin enabled. When I need to do something later I then click to a later day in Obsidian Calendar and add a markdown todo.

I always start the day with the current day in Obsidian