Without getting too into the weeds with retirement accounts and such, my paycheck gets split and direct deposited into three accounts:
Bills. This is based on any regular recurring payments that were made last year including insurance, utilities, car payments, housing payments, property tax, services, etc. I add all that up for last year, add 10% padding and divide it by my 24 bimonthly pay periods.
Living expenses. I don’t have a finely detailed budget. I’m a responsible spender so I can trust myself. This is irregular spending. Gas, groceries, clothing, household goods, car/ house repairs and improvements and general discretionary spending.
Emergency fund. Everything else gets put into replenishing the emergency fund. If the emergency fund is fully funded I will manually make a payment towards my mortgage principal (or somtimes buy myself a new toy 😬)
+1 for this system. I do the same and it makes day-to-day spending guilt free and simple. A few times I have run #2 dry and had to eat beans for a few days, but I’ve gotten better.