According to a recent study, to get on par with people who are of normal weight, I need to walk about 12,000 steps per day. Effectively, that means that I need to take 4 twenty minute walks per day. I could also walk faster, which is what I'll probably end up doing.
My first goal will be a specific number of walks per week. At the moment, I typically only walk when my stress levels dictate it. I'll start off aiming for 4 twenty minute walks per week. Only a seventh of the end goal, but it is a definite start!