I was going to ask my neighbor to help me dig a pool for the backyard, float some of those cute eggheads from Somewhat Sump, throw back a few beers, BBQ, sit on lawn chairs and listen to tunes on the musicblock -- but I'm too lazy to skim the pool.
So, then I thought: I'd love a koi pond. Maybe a small babbling brook. Fountain depicting a glitchian frog with water spouting from its pouty mouth. Buy a Do-It-Yourself kit from an online vendor, or hire manual labor (local artisans, of course).
Or, maybe just a koi pond after all... ;)