Renard
I explained this to Vagabond yesterday when he was kicking my A$$ in one pocket - lol (I can't play one pocket) lol -
Remain in your comfort zone. By this I mean that if you are confortable with one type of break shot, say at he top to the left or right - stay with that and set up for that EVERY TIME - or whenever the opportunity presents itself. Set up your key ball AND a ball designated to get on your key ball. Isolate those balls early by clearing that area out. If you run into problems along the way (crashing into your break ball - left with no other shot except the key ball etc) then you need to identify a back up plan.
Practice your break shots. A lot of players hit the break shots too hard and that is why they miss. I screwed up at 98 the other day doing the same thing. Try your breaks shots at different speeds and make notes about how the balls are spreading and what they are doing.
It doesn't take great force to spread the balls - it takes accuracy.
Plan and then excute. Just like planning for a trip, you need to prepare, plan, and then excute. If you don't plan for a destination, you'll just be wandering aimlessly. Many pool players do this in mid-rack. They get trapped into tunnel vision and lose the perspective necessary to continue the run. Nobody is immune to that. It is important to re-evaluate the lay of the table after every shot, or every 2-3 shots. In my book Stroke of Genius, I outline how to Dissect the rack, and my style is to break the balls into 3 designated groups. Balls are either Set Up, Key Ball or Break Shot (3 balls designated and not pocket until the end) - then we have groups A, B, & C. In the groups I label the balls as either pocketable balls, or transition balls. A transitional ball is a ball that can be used to go from group A to group B. See below diagram:
Remain in your comfort zone, practice your breaks shots, plan and then execute. I guarantee you that you can add another rack or two to your count if you do these 3 things efficiently.