Tips on staying aware of time? I hyperfocus on video games really easily; I just played Civilization V til 3 in the morning without realizing it and only stopped because a noise in the other room caused me to panic and get in bed. I've tried timers but I have a really hard time convincing myself to stop and just turn the timer off. Hours feel like minutes, and minutes feel like hours sometimes. I have issues getting ready in the morning too because of this.
Time awareness and perception is one of the things ADHDers can have trouble with (I definitely do). One of the easiest ways to stay aware of time is one you’ve already mentioned: timers. At least in the morning it could be helpful to set several timers; one for when you have an hour left, one for when you have 30 minutes left, and so on. I’ve also heard tips about making a playlist of songs that you play each morning, timing it so that when a certain song starts playing you know you’ll have to leave soon. In addition to that, try doing things like packing your bag, planning your outfit, and putting keys/phone/wallet/etc. in specific places the night before so that it doesn’t take as much time the next morning. It’s worth experimenting to find what works best for you.
As for using timers to stop playing computer games; I’m right there with you. If the difficult part is motivating yourself to actually turn off at the timer, I think it might work to set consequences for yourself if you don’t. One of the things ADHDers struggle with is motivation and long-term benefits and consequences. Basically we are much more motivated by immediate rewards or punishments, which is why we’ll probably decide to keep playing now because it’s fun instead of turning off the computer so we can sleep enough and not be exhausted tomorrow. This is also a matter of what works best for you. For example, for every 10 minutes you play past the timer you have to put a dollar in a jar (which, ideally, is controlled by someone else; otherwise the jar of money is too tempting to just use). Or, if you’re feeling more extreme, get extension cords with timers on them. If the timer runs out, the entire computer shuts off. Obviously that’s not ideal because you’ll lose your progress, and then once the computer is off you’re much less likely to turn it on again to keep playing.
Hopefully you find some of this helpful!