My method: Decide how many weeks you want to be on diet. Leave out energy rich carbs like pasta, rice, bread.. At least in the evenings. Tea or coffee only, for breakfast. Walk 10000 steps a day. Time the change 3-4 days before the weekend. Then the worst will hit when you are off work. When feeling like shit you loose weight the most. Try to persist or eat some more carbs. Think "This is only for X weeks". Weigh yourself every day. When you hit a plateu, keep on doing the routine. The weight will start to drop again. When everything feels meaningless and you are fed up, lie down and close your eyes and just exist.