I try to pactice at least once a week, first a couple of shots to get loose, then get on my timming, after that foul line drills for around 10 minutes, I'm working on staying behind the ball to create a heavy roll so im practicing that a lot.
2nd drill is the 1 step approach and then my ful approach, all of this drills for 10 minutes each, then spend around 15 minutes trying to hit the corner pins until I get 10 7s in a row or 10s in a row, this is just my basic routine when I practice, if I want to practice 4th arrow or any other type of game, after practicing corner pins I will try to get my timming back to the mark Ill try to play during practice, plus I dont watch my score when Im practicing