I started writing this just after you posted this, then a song I liked came on spotify and I danced away for like 3 hours
and forgot about it till now! So I'm not sure I'm the best person to be giving advice on this!
However I have quite bad adult ADHD so I'm basically the queen of procrastination, because of that I've had many professionals give me techniques for this type of thing (that I clearly rarely use!) but maybe they will be useful to you!
Firstly I use the app "Home Routine" it's suppose to be just for cleaning, but I use it for everything! Which might be useful for the things like getting healthy and keeping the house tidy. But it's not really the app that is important, it could even be a piece of paper, it's just for breaking down tasks and keeping track of them basically.
On mine I have it broken down into tasks I need to do weekly, tasks I need to do every Monday etc as well as my daily routine, which is broken up into: Morning, before lunch, after lunch etc.
I have put in it even the most basic tasks like: Brush teeth, shower, feed the dog breakfast, feed myself breakfast! Obviously you probably won't need to go that basic, but breaking down stuff really does help as others have said, like instead of "cleaning bathroom" I have pick up clothes, empty bin, clean bath, wipe handles etc. So it doesn't feel to daunting and you feel like you've achieved stuff even if you don't manage the whole room.
Basically routine is important, obviously this doesn't work with the bigger stuff like moving house, but for the stuff you have to do regularly is to have a calendar, and do a cross or something every day that you do something healthy like exercise, it's a good motivation, as you don't want to miss a day and mess it up. However if you miss a day make sure you just get back on the horse tomorrow, one of my biggest flaws is I will start a routine and if it falls apart one day, I just won't restart it, I'll be like oh well I've failed. And go back to my crappy routine. Don't make that mistake, just be like oh well I'll start again tomorrow.
I've also got the same issue that I can't work unless I have a deadline, the best thing is to tell people what your plan and date is, tell your best friend or even just a mumsnetter! Just say I'm going to apply to my masters by X date. It will motivate you like conventional deadlines, as next time they ask about your plans you don't want to be like "oh yeah.... I just messed about gaming instead of applying"
For the bigger life changing things, it's cheesy, but stick a big poster/whiteboard up somewhere you often sit, with your goals on. It's really easy to lose sight and forget about big things like that, as you just get bogged down by the smaller stuff, have it up somewhere you procrastinate often, above the computer? So you can visually see it when your gaming or whatever, it really works for me, as it puts the decision in my face like I'm gaming instead of changing my life for the better (I said it was cheesy!)
If you've got something to do, don't think: I will do it after watching this tv show/gaming, because one episode, turns into after this whole series. Do the gaming/tv watching AFTER you've done the task you wanted to complete today.
Apologies for the long post, I got a bit carried away when I got going, clearly putting off doing work!