

Very interesting question honestly. The folks at my work probaby wonder it considering I am always giving enthusiasm even at the start of the work week.
I would not so much call it a “cheat code,” but what helps is to place yourself in this moment in time. What happened did, what happens now is, what happens later is not yet reality. To be fully present in the moment you are, and to embrace that and be in tune with your inner realm, that is how you can live life fully. At least, that is how I see it.
Many worry about the past which is just pointless, many worry about the future which will come regardless of worry and can only be changed by being present in the now. If we lose ourselves in times that are not, we lose the time that is, which is a travesty. “Right now is still special because you are here for it.”

Firstly, congratulations on nearly reaching the starting line to the rest of your life. 18 always feels different to different people, but mostly everyone finds that life changes quite rapidly after that level-up.
People here have mentioned getting a job, but I want to offer a bit more actionable advice:
I am not going to offer financial advice since, well, I cannot do that. But the above is general job advice from a girlie on the boulevard, you can take it or leave it. I will opine one thing though: Banks usually have a way to automatically transfer money to a savings account and you can set percentages when setting up direct deposits so you can put money in one per paycheck, if you feel so inclined to do so. That is up to you and your situation though, just mentioning it if you were unaware of that.