Do you practice and if so how long and is it every day or every few days once a week.
For ball potting practice, none pro stuff:
Practice at least 10-30 min before a match or gamble session. Every player has his or her own pre-shot routine steps in order to make a pot. It usually takes our brain /muscles more time to remember all of the required steps while playing a match or gamble, so you might loose few games before you really get into perfect rhythm. We are talking a bit hard pots, say 5 or 6 diamond distance, and larger than half a ball cut. Therefore, must practice at least 30 min before a match or gamble session.
Practice winning and loosing matches gamble as much as you can as high as you can regularly , practice how to protect your lead:
This is critical practice; just like when Fire Men, or Army do live drills, got to gamble to be good, and play as much as you can, and as many type games as you can.
For ball run practice, banks, shooting with high speed -None pro stuff
It would not hurt to give this 15 min if you have it.
For professional type practice
A whole different practice depending on your needs; i'd say you will need 4 hours of potting practice long and hard cut shots, never easy shots.
Once mastered the 4000 shots possibilities, then you can break and run. Best of luck.