Tips and techniques: Reducing the mending burden

I am hard on my socks.

I don't think I particularly mistreat them in any way, but beyond simple wear, I seem to have a habit of snapping the cast-on edge when taking them off or putting them on. To a degree, this is probably something I should expect: I have the dainty ankles of a runner, and the feet of a 6ft tall man, so for socks to stay up, there is literally a tension between keeping the stitch count down at the ankle, but up around the heel. Snapping and swearing are an inevitable consequence.

Having a loving and patient wife who is happy(ish) to mend my socks for me, I possess a few pairs of colourfully repaired socks. 

The big question is though, how do I prevent breaking the socks in the first place while keeping the cast-on stretchy? I think I have one possible answer. In future, when casting on for socks for me, the yarn needs to be held doubled. This should drastically reduce the likelihood of the dread sound of snapping, my contributions to the swear box and the pile of mending.

Have you got another idea to solve this problem?