I home test and adjust my own dosage.
I had been taking 10mg M,W,T,F,S and 9mg T,S. Last week my INR was 2.0 (range 2-2.5), so I increased my dosage to 10mg everyday.
Then on Tuesday I went for a 5km run (hadn't done in a while) :D Had been out golfing on Monday night and coaching on Tue night...