Put a sticky note in front of you that reminds you to ctrl+s when you see it.

Your brain is conditioned to reflex after you do something some 500+ times. Have fun. Took me some time but now ctrl+s is as natural as driving. Sometimes I press Ctrl+S when im not even doing something that requires me to save... >_<

Anyway, I do agree that It should be fixed - But shouldnt be a rush thing imo