A spinoff...
After all bills are paid....what do you have left for savings or fun money?
Savings: ready for it....$30, sometimes $50 depending on the month.
Fun: Maybe $20-$30
I know most people will think, well put the fun money into savings too, but honestly we would go stir crazy if we couldn't go out here and there. We have to live a little too.

If you don't mind getting personal, share how much leftover money you have a month when all is said and done. You could do a percentage if you are more comfortable with that.