For February I am going to take Momentum for a spin. This app is fairly simple: the more habits you do daily you build up momentum, i.e. a backlog of goodness that you won’t want to stop.
I use Wunderlist and PomoDone as my productivity tools. But I haven’t found a great tool to help me with a few of the nagging habits e.g. daily set the three most important things to finish. I tried Coach.me for a while but never quite liked it. So my habit for February is a bit meta: use a habit-forming app to form my new habits.