After demoing other programs and trying out different websites I use Sporttracks. One of the main plugins I use is the "Training Load" plugin to, based upon heart rate, track in a somewhat objective way, my Training Stress Balance and fitness. I also use the Analysis and Overlay plugin to look at a somewhat smoothed average for speed and heart rate. There are a lot of other plugins too that do things like guesstimate power based on wind speed, weight, speed, grade, etc. (which of course isn't accurate but based on what some people say they have found when they compare it to a power meter is a pretty good approximation of power without a power meter), calculate power from trainer power curves, download weather information, compare routes, etc. There is a ton of information available to look at - as much or more than you want, or as little as you want.

I have every ride I have done in the last year and a half (pretty much as long as I have been riding) saved except one when I forgot to charge my Garmin.