Unless I am in a time cruch, one medium sized bucket works perfectly for me... Any more and my swing suffers due to fatigue. Any less, and I usually feel like I didn't have enought time to even improve. When hitting a large bucket, I don't always feel tired, but my swing gets sloppy. I often start fatting balls and lose all of my mojo. At that point, I take a quick break, regroup and focus on two consecutive quality strikes, etc. Once I get two quality swings in, I'm done and I walk away, whether there are balls left or not. I think it is much more beneficial to leave the range with good feelings. Once you lose the groove, it is often times hard to get it back.
What I need to start doing more often is hitting a small bucket before a round. Too often I find myself avoiding the crowd at the range and just going straight to the tee box. I'm sure it would make a difference on my round, but unless it's a league night, I'm not all that motivated to "warm-up". Anybody else?