A while back, I happened upon a vending machine that contained not just the usual sugary, salty fare, but also a life lesson. Pictured you'll see a regular size Reese's Peanut Butter Cup upstaging a king size of the same item. The larger candy is in the same row, it costs the same, and yet is still one purchase away from being obtained. It just so happens that prerequisite purchase is a lesser snack.
This is the sort of thing that can occupy my mind for long stretches. (For those interested, I went with the Garden Salsa Sun Chips.)
I guess the takeaway is a simple one: You can't get to the larger stuff until you take care of the smaller stuff.