[Kourosh]

I like the GTD idea of getting it off the mind. If it is something that is on your mind, then finding a way to have it off of your mind is useful. OmniFocus can help to the degree that it helps create lists that maintain things off the mind as well as helps to line present tasks alongside others.

You could use it quite well as mikegibb and wilsonng note for habit building. Personally, I have a number of tasks in there that are fairly maintenance in nature, and I largely can do without looking at OmniFocus. However, I keep them there as it helps me to look at the number of things going on as well as shaping/shifting the habits I have.