Yeah... it can be pretty darn hard to force yourself out of the habits OCD creates, hell, you will never get fully rid of all of'em. But at least (from personal experience) you can reduce their number and severity massively by consciously going against your own "instincts".

It is darn hard and causes you to think about it the whole day/week the first times around, but the more you get used to breaking these habits the easier it becomes.

Nowadays, my OCD only kind of flares up regarding walkways. Ye know, the standard "no stepping on lines" and when it comes to writing stories/quests (and the "taste" of water, though that one is still bit of a bitch to try to ignore).

Trust nobody, not even yourself.