What do I need to know about living on my own?

I am 19 years old and am planning to move on my own, with a room mate or with out one, probably with one, hopefully a friend, maybe not. You can give me advice and knowledge on both possible situations, moving in with a rooommate(friend or not) and moving in by myself.

I am planning to live an hour away from home by myself, I will be going to college as well and I’m sure if my parents will be supporting me financially with bills or not. my main question that I am wondering about is what are all the things I should be aware of before moving in, I have been living with my parents since I was born so this will be a complete change. Please tell me all the Do’s and Dont’s when living on your own, what I will be coming my way (in terms of responsibilities), things I should watch out for, what to expect and not to expect, really Anything and everything else you can think of. that would be good to know for this.

Those with First hand experience would be prefferred for this question. Please do not hold back, let me know everything and anything needed to know about living on your own, whether your a 21 year old who just moved or whether your an 81 year old who has been living on their own for a long time. All answeres greatly appreciated! thank you!