OT: taxes - sometimes I'll write "at the money" covered calls on a position that's nearing the long term capital gains holding period .... that locks in some "time value" gains and also gets me a 15% federal tax rate rather than 35%+ (when I'm assigned on the calls or sell the stock when they expire). It can make a big difference, but obviously if there's a compelling reason to sell immediately, then that's the right thing to do regardless of tax consequences.
Its always a trade-off. Sure, if I see a company I own go way past my 'price target' i'll sell it regardless of the tax issue.
The fact that we are 2 weeks before the new year simply makes me do less short-term trading. Your short-term trading is never perfect, you often sell while the company keeps going higher/etc. The tax impact simply changes the determination point of when I decide to sell since it adds a 'cost' to every sale thus impacting the sell/hold profitability probability matrix.
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