I keep a pad next to my throne. Not the drum throne. Ewww!
JK!
I only practice when I feel the urge, which goes in cycles. I'm at a point where if I don't practice for a few weeks, it really doesn't detract from the skills I need for gigs. I'd say that the hand/feet skills I need for practicing are greater than the skills I need for gigging. Gigging is easy, fun and enjoyable. Practice for me is fun and challenging and a little enjoyable, but it can't compare to playing out. Playing out is where my overall musical skills/timing/mental focus gets the workout, practice is where the technical/muscle aspect gets the workout. Like at a gig the other day, I tried to slip into the practice mindset in the few minutes I had before we started our first song, and it felt foreign. It's 2 completely different mindsets with me.
But to answer the thread question, no set thing. Whenever I feel like it. Most of my practice energy goes to my weak hand, which isn't that weak anymore, but it still doesn't possess quite the degree of finesse that my dominant hand has.
On a completely unrelated note, I've been liking doing diddleparas. It's more of a mental workout for my brain than paradiddles.