I've been using Actifit for years but it hasn't motivated me to get off my bum and walk every day. For some of us it's a real challenge to get moving.
I've made it a little easier for myself by treating myself to a coffee every afternoon so it's easier to go out and walk for that. Even then I don't always make the 5000 minimum for Actifit. Today for example it was too windy to be pleasant so I took the short route which means I've only done 4131 steps so far to day.
I find setting an alarm and getting up from my chair every 45 minutes helps with the step count too but I often forget to do it.