Life's Purpose - 'Just Do It'?

It seems you need a purpose daily to enjoy the fruits of your labor. If you 'just do it', you really dont get as much out of 'it' whatever that may be. I know the idea is to just get moving and hopefully your mental feelings will catch up with your active body. I just wonder how long that takes. I guess it would help if I took that first 'just do it' action and got away from the damn computer. I am so addicted to Second Life and I think it is time to remove myself from that game until I can get some self-control.