My choice is:
Get up stupidly early as I need two buses to get where I need to be, I can cycle to bus number 1, and lock bike. But that takes 20 minutes, then I need to get bus which takes 35 (rush hour traffic) that's 55 minutes, £3.50 later and it means and getting stuck in a stuffy bus with grumpy people.
(Did I mention I don't like buses and get car sick?)
Or...
Put the winter tires on, which will increase commute from 40 to 50 minutes I guess, not need to be in a mad panic to get bus, get some fresh air and learn to cycle in adverse conditions which is always handy. Also the click-click-click of the studs will no doubt have hilarious effects, people thinking of stepping in front of me and changing their mind last minute
(forget about the gym, no driving license and HAVING to be somewhere works best)