I agree with what someone else said: make a concrete plan. Maybe you can tell us what it is specifically rather than "maybe I'll have a pizza". I mean, something like: 5pm - Leave work, 5.30pm call a friend, 6 - 7.15pm go to gym, 7.30pm arrive home, 7.45 - 8.30 cook and listen to radio etc etc
See what I mean? Something straightforward to keep you occupied.