Every now and then you may end up with spare nuts, bolts, screws or washers.  You don't want to throw them away.  Keep them organized in a container (a tackle box works really good).  One day you WILL be in need of a random bolt or screw and and that box of spares could save you a trip to the hardware store (not that going to the hardware store is a bad thing but it could still come in handy).

When buying paint, stay away from the cheapest brand.  They never cover well or evenly and you'll end up with double or triple work putting on extra coats.  Spring for the good stuff, it will cover better, dry evenly and it will probably do the job in one coat.