Where do you practice?
I know a lot of people like football fields, or soccer fields, or pretty much anywhere else you can go have a nice wide-open space to chuck discs. Where do you go, and why do you go there?
I started out going to a football field mostly; the measurements already being there was nice. It's usually mowed (even in the off-season). Mine has concrete behind both end zones (a long jump runway and a high jump pad).
Recently, though, I discovered a net batting cage. It is AWESOME!!! 600+ throws in 2 hours; where else can you do that? It's a tunnel shot that doesn't wreck your discs if you miss. Decent footing everywhere ... just everything I ever wanted out of a practice spot. Other than being able to tell where your disc would have gone (how far, how much fade, etc.), but that doesn't matter that much, right?