I have it set to launch on startup, and always open on my second screen. I have to make a point to check my day's task list before opening any other program, add new tasks as soon as they come up, check things off when they get done (free dopamine), and note down any unresolved items at the end of the day.
I also end up checking it incidentally a lot during the day simply because I use it for so many things, like my schedule, appointment and lecture notes, journaling, keeping track of medication, things I want to work on in the game I'm playing, etc. I'm kind of throwing all my (previously very disorganised) eggs in this basket and it's giving me reasons to check it constantly.
Just now discovered a reminder plugin so I'll start implementing that too.
Actually getting things done is a whole other issue though. Between the ADHD and my other health issues, some days I just end up with a blank template page for my daily note... but I try not to be hard on myself about it.
I'm finding Obsidian.md really great, it's become my daily checklist, to-do lists, shopping lists, calendar, and notes archive all at once. It doesn't give reminders (there might be a plugin for that actually) but I always have it open on a second screen and I sync it between my phone and my computer, and I've been much better at keeping track of things since I started using it.
The program is kind of a lot, but it's worth putting in some effort to set it up in a way that works for you. Although to be honest I think I only figured out how it works because I was also motivated to use it for Dungeons and Dragons. Otherwise I'd probably still be using my old mess of sticky notes.