I don't rebalance. My projected dividend and interest income provide me with a budget and monthly withdrawal from my brokerage account to my checking account.
I do monitor my AA, and use index funds in my IRA to make any fine tune adjustment but not any type of time based system.
The three times I have made conscious changes to my AA, 2000 more bonds, 2008/9 more stocks, 2011 less bonds/more real estate. Tax considerations were a pretty minor factor. (In the case of 2008/9 I had plenty of losses to balance my modest bond capital gains)
I am definitely guilty of hanging onto to individual stocks too long because I don't want to pay cap gains. But since generally I buy to early and sell to soon, this really hasn't hurt me too much.