I don't make resolutions but decided the same as the OP that this year I need to pull my finger out and get things done!.
I'll be doing at least two 1/4 mile drag racing events this year, spent a fortune on building a car to do it and it just sits in the drive.
I have a MK2 Golf that I've owned for 15 years as well, took a day off today and got stuck into that, made some good progress and hopefully have it MOT'd and back on the road by June.
Put 4 kilos on over Chrismas so will have to deal with that, found out before if you just let it slide that's when you start piling the weight on! (Lost 2 1/2 stone a while back and don't want it back).
My lad had a project motorbike that we started doing up (Honda MT-5), busman's holiday for me but I need to get that done this summer. He's doing the work but I'll show him what to do, bit of father and son time
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One last thing, look for the positive in everything!. I've spent far to long looking at the negative side of things, time for a change.