Keep a calendar in a prominent place where you can always see it:
Mark important dates on the calendar as soon as you know about them: when rent is due, when certain bills are due, when the trash goes out, etc., etc.
Purchase only what you need - for example, you have to have water and heat and power and internet, possibly phone, but I could never justify the added expense of cable television.
I like watching the same movies over and over again, so that's helpful to me, whereas with some people it would be a problem.
Do you know how to cook? If not, get a cookbook or, better yet, have a friend or family member show you some easy recipes.
I don't do well on a schedule, but you might. If so, have certain days that you do laundry, certain days that you go shopping for food, etc., etc.
These are things that helped me when I first moved out - I'll try to post more as I remember them.
_________________
Diagnosed with High Functioning Autism well into adulthood.
It's never too late to get a diagnosis.
Hell, I thought I was just weird.
i can (obviously) come off as really abrupt and my tone can sound sharpish, so feel free to ask me to clarify