I feel your pain. I finally gave up and just keep it on the camera all the time. It was a little awkward at first, but I've gotten used to it. Now the tripod mount ring for my 70-200? I think I last saw it in the car.
bentcountershaft (has your name changed or is this just the first time I've actually read it!) - get yourself a Lenscoat cover for your 70-200mm. Not only will it make the lens all warm and easy to hold even in colder weather, but it also means that once the cover is on you have no choice but to keep the tripod ring on the lens at all times.
