This entire semester I've been working on increasing my accuracy and speed, and I've made tremendous progress. But for the past 3-4 weeks I've been stuck around the same tempo in speed. Usually towards the end of practice I'll do chromatic exercises and slowly go higher and higher with the metronome. Right now, I'm stuck around 125-135 bpm for 16th notes, and I'm finding it difficult to get much faster than that. Does anyone have any tips for overcoming plateaus such as mine?