I personally put 10% per paycheck(26/yr) into a 401, then 30% of remaining into savings.  Direct Deposit.
Then the rest I spend if I want or need to.  Anything I don't spend is a bonus.
I remember my grandparents always saying, if you save 10% of your gross, that's good.  I know I save way more than that.  I guess my expenses are pretty low right now though. no family, kids, mortgage.  Low rent, utilities and food is all I got.
Although I predict in less than a year I will open an investment account once I am content with my nest egg in savings/money market.