Practice, practice, practice; playing every title available; learning every game's rules and the best point exploits for each ball.
In particular, learning what's different about a game's tournament setup versus standard play. Some are quite different and make it way easier to rack up the points. Case in point: For TAF, they disable the magnets since everyone was timing them out to get them to shut off anyway. Can you imagine how easy the rinse and repeat on the multiball jackpot would be on TAF with the magnets disabled?
