Everything that works in sales has been done already. Just keep track of the crap that you buy, or the awesome stuff that you buy, and decide what was the trigger, and then just sell to people like you. It's really that easy - and that's what I do.
“History has shown that a government's redistribution of shrinking wealth, in preference to a private sector's creation of new sources of it, can prove more destructive than even the most deadly enemy.”