Here's Vijay Singh Doing A Stick Drill

Drills drills and more drills.  There are tons of different drills out there but the most important thing is...do you do them properly and consistently?  I see folks do a drill one or two times and expect it to spawn results.  Not so.  You have to "nag" your body into submission.  If you do not understand this process please live with my wife for a month!

Doing drills in short intervals "often", even without a ball is the way to go.  It is the process of logging a sufficient number of reps that build the consistency.