Sensei Marston suggested that I find a few combination moves that I like and practice them. Work at home and develop the moves then find someone at the dojo and ask to practice with them for a few minutes. Also during sparring workouts tell my partner that I want to work on these moves for a couple of minutes.
What I heard; develop a vocabulary of Karate strikes and kicks. After you know a few words put them together into three word sentences. Drill a set until it becomes second nature (learn the drill, do the drill, forget the drill). Sen sen no sen; learn to ask the questions that your words (strikes/kicks) can answer. She said you really only have a couple that work well for you and will use them all the time. Ah, master a tool and then find places and situations to use it.
Sensei Marston also suggested putting 1" tape targets on the punching bag and practice accuracy. Work the combinations for accuracy.