All these things that I have done

Right. I weighed myself this morning and I am 15 stone. This is way significantly too much. The last 3 stone of that has been put on in the last 4 months pretty much (although I haven't been formally tracking so I could be remembering that wrong). I need to do something about this. I'm going to make an appointment with my GP at the beginning of next year and see if she's got anything to say or any suggestions but for now I'm looking for suggestions from you lot. This is my experience so far:

• Slimming clubs per se don't help motivate me. If they've got a good program and my willpower is good then I'm happy to pay for them but the being weighed by someone else bit isn't a motivator for me and I generally find that most of the people at the meetings have completly different lifestyles to me so I don't get much from the discussion. That being said, if you know a good one with a good system, feel free to recommend it.
• Previous experience shows that unless I actively enjoy an exercise I don't stick to it and also that there are very few exercises that I actively enjoy. I quite liked swimming but found that if you do that every day you end up smelling of chlorine all the time, which I really didn't like. I like riding horses but that requires a regular timing and somewhere to do it (none of the Oxfordshire stables I've tried have ever answered their phones or called me back!). Now that I've finally recovered from my cold I'm cycling to work again but any other suggestions for exercising are welcome
• I've had a huge increase in my desire to snack during the second half of this year. I notice it particularly when I'm watching TV - if I'm settling in for an evening of Veronica Mars, I'll usually do it with a couple of glasses of wine and half a pack of (low fat) cream crackers. Any good tactics for distracting myself from my desire to snack? (n.b. I can't knit while watching TV :) ) Previously I haven't had much of a problem with this - I've snacked before but it's been much more under my control.

So, any ideas?