What is your warmup or session routine?
Every single time I go out for a session, I do 20 tricks on flat. Sometimes it is all I do, and it is a session on its own as you don't have any particular trick on lock like you used to, especially when you only skate once or twice a week or so. Apart from the below warmup/session routine, if I get through all of the 20 tricks, I'll keep doing repeats faster and better, or start trying heelflip tricks (the arch nemesis).
The 20:
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Regular/Switch/Nollie/Fakie ollies, 180s in the all the directions, shuvit, kickflip, frontside and backside flips, treflip, melon grab, and two rotating tricks that come and go through the ages, usually nollie front heel and fakie frontside flip.
Keeps an aging man able to skateboard decently without losing too many of his tricks.
Share yours. :-)