Harrington recommends you bet more with hands like JJ and TT, and less with QQ-AA, but he also reccommends you vary your bets. You might raise the same range with both sets of hands, say 2-5xBB, but with the QQ-AA you bet more often 2x or 3x, and with JJ,TT, you bet more often 4x and 5x. He says he uses the second hand of his watch to decide what he bets. For example, for JJ,TT, you might bet ...
1-24 (40%)- 5xBB
25-42(30%)- 4xBB
43-54(20%)- 3xBB
55-60(10%)- 2xBB

For the QQ-AA, you would reverse it, betting 5x only 10% and 2x 40%. Using this distribution, you would average betting 4xBB with the JJ,TT, and 3xBB with QQ-AA. Even if someone knew what you were doing, they couldn't put you on a hand with great accuracy.

I am curious about AA. Many of you don't like having a lot of opponents with AA. I play mostly limit, and know that you will make more money with AA the more people are in the pot. More action is always better. Does anyone know if this holds true in NL, or is there some dynamic in NL where more often only hands that will beat you will call down in many cases, making there an ideal # of opponents for AA that is not 'as many as possible' as it is in limit?