The crotch grab is nice, but what I really like to do is get into the shower and start bathing and/or playing with the water, while trying to hold your pee without any grabbing, sqirming, etc. Just stay completely still, hands away from your crotch, while you can hear, see and feel the water all around you. Admittedly, I often hold my pee until I go to shower, just so I can do this everyday. :)
In short, I like to hold my pee without any particular method, and while provoking my own bladder.