What's the best routine to have for a clarinet practice?

I'm a sopre in high school and have been playing the clarinet for five years now. I just performed a grade 5 piece for my solo during solo and ensemble (the piece was Dance Preludes by Lutoslawski). Also, I'm in my high school's wind ensemble. Lately, though, my practices have just felt lacking. Anyone have a routine or habit of practicing that they feel really helps them? I usually start with long tones and scales and practice any where from a half hour to hour. Any tips?