This is probably the largest question posed to APs by fledgling APs. Be yourself, be creative and think "outside the box". In most casinos you need to play without the floor noticing your skills, as they eye rarely looks without cause. There are a few exceptions like the Suncoast in LV.
The best APs are like the best of anything, they individualized their strategy to their own personality. The greenchip member's board here has archives that are spectacular. Its not free, but if you are serious the small fee is nothing.
In addition to what has been previously posted, Ian Anderson's "Turning the Tables on Las Vegas" has a chapter titled "How Not to be a Counter". This is the predicessor to "Burning the Tables and can be purchased for pennies on the internet.
Also, Wong's "Blackjack Secrets" contains excellent info on the demographics of a card counter.
The best teacher is naturally experience. My most recent problem was caused by a matchbook from a casino that I played in the previous day. The PC was sharp enough to know that the matchbook casino had an excellent game. This was enough to precipitate a lengthly question and answer session between myself and the PC. I eventually was able to change the subject to the cute young ladies that hang out that casino. I fed him enough B.S. that he finally left me alone. You have to keep on your toes.