You need a carrot and stick approach, but it something you have to work on yourself. Regularly remind yourself why you want to lose weight (health, fitness, looking good, sexy etc) and tell yourself that you don't want to be fat and and unfit.
But don't beat yourself up if you allow yourself a little indulgence every now and again. Just get back on the wagon, and keep on track to reach your goal.
End of March - 119kg - 118.7 - made it!
End of April - 115kg
End of May - 111kg
End of June - 107kg
End of July - 103kg
End of August - 99kg
End of September - 95kg
End of October - 91kgEnd of year - 81kg TARGET WEIGHT - Optimistic