I have been doing ok on estimates lately. The trick I use is to break everything into tasks <= 4 hours, ideally 3. In fact, I much prefer 3 because with 4 hour

I have been doing ok on estimates lately. The trick I use is to break everything into tasks <= 4 hours, ideally 3. In fact, I much prefer 3 because with 4 hour tasks it's too easy to think almost anything will take a half day. That keeps things realistic and errors in your estimates from snowballing. Also, I rarely find any tasks to take less than one hour.