i used to do a similar commute, i loved it. i also loved cycling to football and then cycling back home. it really helps with the warm down/cool down. or did with me.
drink lots of water, flapjacks on the desk (for the first week or two i was constantly hungry, then i got used to it and didn't eat as much), eat food (great article by the way here: http://www.michaelpollan.com/article.php?id=87).
hammer some routes home. enjoy the bits through parks. get lost, so that you have to work out which way home is and where you are and thereby change your route. hills are your friends. no such thing as junk miles. don't look to just your commute to keep you properly fit, keep up the other stuff as well.
i used to do a similar commute, i loved it. i also loved cycling to football and then cycling back home. it really helps with the warm down/cool down. or did with me.
drink lots of water, flapjacks on the desk (for the first week or two i was constantly hungry, then i got used to it and didn't eat as much), eat food (great article by the way here: http://www.michaelpollan.com/article.php?id=87).
hammer some routes home. enjoy the bits through parks. get lost, so that you have to work out which way home is and where you are and thereby change your route. hills are your friends. no such thing as junk miles. don't look to just your commute to keep you properly fit, keep up the other stuff as well.
i think that repeats what everyone else has said.