Originally Posted by NewATBikeComute

+1. Keep it fun.


Beyond that, given that it sounds like you might not have a lot of time to ride, you might check out HIIT, or High Intensity Interval Training, which many find to be not as much fun (me included), but a very effective way to increase fitness level in less time.


When I get on a 'gotta increase my fitness level' kick, I have to remind myself to dial it back when I get to the point of disliking any and all exercise. But that's me, not necessarily you, or anyone else.


Keeping it fun, though, and I am now on my third year of commuting (partially) by bike; that's about the longest I've keep to something healthy for me, and I've done it by paying attention to Rule #1 : Keep it fun.