Swimming. I do it weekly but only manage a handful of lengths front crawl whilst others never seem to stop.
mudsux – find out/google/youtube 'Total Immersion' swimming and you might find things improve..
I totally agree with that – it made such a difference to me. It is also great for proper outdoor swimming confidence. Nowadays I swim both crawl or breaststroke at least vaguely efficiently, it is so much more satisfying.
You can't learn to swim well without a coach of some sort watching you telling you what to do better and repeating the process over and over until your stroke is good. Then you have to practice
It's not like running or riding a bike, there is a right way and all the other wrong ways.
Not that I wouldn't have coaching if I could afford it / had the time to swim much, I think the Total Immersion books / videos etc. do a great job of at least making it possible to not suck completely without a coach.
Also, I think it is like running (and probably like riding a bike), in that there are right ways and wrong ways to do it. Running there are so many wrong ways, I did a running session with the "Art of Running" guy, who teaches a running style based on the Alexander Technique, and it made me a so much more efficient and fast, and also meant I don't injure myself, even with my very on/off training, whereas most runners I have met seem to injure themselves on a pretty regular basis. After doing that course, it is obvious how inefficient most runners are too, you can just see it in the way they run.
Joe