Develop a business where you don't have to buy products...
Use only your brain and time to develop a business, i have now (it was in plan for about 6 months, i procrastinated lot trying to find perfect programming environment for it and i found it... but i still don't know how to use it right..
Your time does not cost you nothing, you could spend watching tellie, or side kicking extra learning material
, or go out having lots of fun.. your time is leverage.. you could not get nothing in returns for it in the beginning of business venture, but later.. who knows... maybe it will be worth 10,000 $US for every hour you invested..
Best of Luck,