Travel Categories: Ranked Easiest to Hardest
1. Social & Recreational
2. Daily Commute (to work, school, etc.)
3. Shopping (groceries etc.)
4. Personal or Family Business
For Recreational, it seems like a no-brainer to walk, run or bike, especially if there is no set destination or time constraint.
But for Daily Commuting, I can also find friends that commute downtown around the same time and arrange a carpool. Alternatively, I sometimes like to bring a bike in my car when the weather is nice. Then I can park much farther from work, drive less, more easily find parking and get some exercise while I commute.
For tips on commuting by bike, go here: http://www.commutebybike.com/cats/commuting-101/