I use a pretty simple excel sheet. The first sheet is a "summary" where I track my networth in investments, so 401k, IRA, brokerage, etc. and an overview of my expenses. The next sheets, I track my credit card bills every statement (so this figure is a month behind) to make sure I'm spending within my means. Also track my investment/savings account to make sure I'm in line with my financial goals. I NEVER go into credit card debt, pay it off as soon as the statement comes in.
I automatically take money out of my paycheck to invest in 401k and IRA (max out both up to employer contribution, so about $26k a year). Health insurance is included in this.
Whatever is left after those contributions is my "take home." I then list my fixed expenses, so student loans, car insurance, gym membership, rent, gas (estimated), etc. Subtract that figure, and the rest is my "post expenses take home."
Because I'm still young, I prioritize fun first, lol. I take out $x amount from that figure every month and put it into my "for fun" bank. This is for hanging out, drinks, entertainment, poker, poker chips, etc. In my case, I keep poker separate from my other fun. I keep a "poker bankroll" that is $x amount, and if it falls under, I transfer money from fun to poker. This also applies to my "for fun" bank, unless I know I'm saving up for a purchase (poker chips). If either is over a certain amount, I transfer the extra into my brokerage.
I take out a separate $x amount every month to save for travel, which is put into a HYSA.
I try to be flexible with my fun and travel bank. If I know I want to travel, I'll try to not spend so much on fun and put the extras into my travel bank. Or if I want to buy chips, I'll withdraw from my travel bank, etc.
Whatever's left is "post fun take home" which all goes into a brokerage account. I'm about 80% SPX and 20% speculative, which isn't the smart thing to do, but being on PCF, I'm clearly not the smartest with money.
A smart person, especially someone young like us in our 20s, would probably aggressively save/invest to let compounding interest work instead of budgeting so much for fun, but you're only young once yadda yadda is my belief.
This is what my spreadsheet summary looks like: