Walking for Lent

Lent begins March 5, so I've been trying to figure out what to do for Lent this year. One of my goals this year is to be more active, something that is very difficult for me to actually accomplish, and here's why:
Commute to work: 1.25-1.5 hours Normal workday: 8 hours with a 30 minute lunch. Commute home from work: 1.5 hours
I get two 15 minute breaks per day, one in the morning and one in the afternoon. 
When I am not at work, I am at home, writing. Some days, due to other oblig...