During the winter I primarily used an indoor trainer and made an effort to pedal at a high cadence 90-100. It seems that I have gotten used to pedaling at this cadence and even when I use a higher gear I maintain the higher cadence. As a result I am riding 2-3 mph faster on average than I was last year.
UOTE=carpediemracing]An old trick is to use a slightly big gear, get to a comfortable cadence, then shift down one gear (i.e. easier). Look at your cadence in the big gear then look at it again a minute or so after you shift down. You'll find yourself spinning faster.
I used to go out on rides and try and keep my average cadence really high - 120 rpm for an hour or so was my normal limit. By focusing on overspinning you'll find that going, say, 100 rpms is suddenly really easy.
(over) spinning also teaches you to be smoother, more efficient. Do max rpm sprints (no resistance - like a 39x19 on a flat road). Go for 200 rpms and once you get there, go higher. You'll find yourself spinning much smoother once you are able to hit such high rpms. Mid 200's seem to be a normal limit for racers, upper 200's is really fast.
As a bonus a spin day is relatively easy on your legs (except the max spin things which kill mine).
good luck with the spinning
cdr[/QUOTE]