I find the motivation to lose excess weight isn't the real problem ... The real problem is getting complacent once the target has been achieved! I got down to just over 77 kg (~12 stone) but then relaxed and before I knew it I was back up to 89 kg (~14 stone). I suspect the secret is to slowly drift down the last kg/lbs so it doesn't take a big change in habits to stabilise at the target weight. After that, set a sensible margin either side of that weight, say +/- 2 kg (3 lbs). If you approach the bottom limit, allow yourself a few extra treats until you are back to the target. If you approach the upper limit, switch back to your steady weight-loss regime until the surplus has gone.