I'm about to take the plunge into full-on commuting to work, mostly because as I try to work in rides after work I find it ends up leaving me little time to do anything else afterwards. I've commuted a couple times and it's no biggie - about 11+ miles each way and I can do it easily in about 40 minutes or less. Mind you there is some pedestrian traffic in some areas of the path I use so that accounts for a slow-ish seeming time. Anyway, I'd still like to get my training in somewhere, but I don't know if it's necessarily a good idea to be hammering intervals on the ride into work. I am on my feet all day and I my job can be quite strenuous sometimes, so I don't really want to get myself all tired out before the day has even begun. I've been wondering if maybe I should just commute and save the training rides for the weekend, but I don't want to over train in that I'm in the saddle seven days a week. Finally, I say "train" but what I really mean is just trying to do some riding that helps build my fitness levels back up. I'm hoping to get into doing some long distance riding such as semi-regular centuries and I'd also like to try a bit of cyclocross racing this Fall and Winter. So, by all means, not a hardcore pro-racer, but an avid cyclist with aspirations of more than simply the daily commute. Suggestions or sage advice?