I guess that alot of poeple here cross train, where as techniques can be quite style specific the training drills to train attributes can be very open. for the arts that you have studied what drills would you take?
for example for me
TKD, streching and conditioning drills
Krav maga, mindset drills
Baguazhang, sensitivity drills and qi gong,
Aikido, footwork and movement drills
i realise that very often the drills are linked more to a teacher than a style but these certainly are the ones i have found to be most effective