I feel like I'm spending too much. Please tell me how I should manage my money?

Not sure if my input is very good or very bad on this subject, because I've always been a maximum skinflint; I barely spend $100 in luxuries on myself in a year, so, usually just a game or two and maybe a book. I find alternative ways for paying subscriptions on games, usually I can talk a friend into subbing for me if I pay them "x" ingame money in the game of their choosing per month. Same with cash shop purchases. It'll be a bit hard to manage that if you have any friends whatsoever, though, since I consider movies/going out to eat/snacks as luxuries too. As for clothes...I've had mostly the same stuff for 10+ years, my only pair of shoes are actually 14 years old and still look fine because I don't actually -do- anything to muss them all up. Clothes are a much bigger issue for most people though, so it's hard to give advice on how to spend on that when my life perspective is so skewed, lol.

And yeah, the goal isn't to guilt yourself out of purchasing things, it's to simply not want to purchase them in the first place; guilting yourself is worse than just buying the stuff, stress is not something anyone needs.