When I was training for my first tournament, my Sensei had me practice one move in particular. A sliding lead leg round kick, followed by a lead hand strike to the face (faking it), followed by a rear hand chest punch. The kick was to close some distance, the lead hand lunch was to baffle the opponent because nobody wants to get hit in the face, or at least get them to lean back a bit, and the rear hand punch was to score the point. Otherwise, he had me get use to moving around on my feet a lot, moving on angles instead of straight back. Practicing that combo a lot kind of gave me a building block for other combinations, or at least give me something to go off of. I recommend practicing combinations on a bag, in the air and on a sparring partner! The hardest part was just getting used to moving around with an opponent. I came in first place for Kata and second place for Kumite 😁