Need help with consistency

Right now is the part of the season where my team really focuses on speed work after transitioning from conditioning. In the past few weeks my times have been steadily dropping and I would like to keep this trend going (I'am afraid of hitting a plateau before my state competition), any tips or suggestions?

Here's on overview of my progress: http://www.athletic.net/TrackAndField/Athlete.aspx?AID=3920129