Cheers for the replies all. 
Ed-O - I've tried the easy trails and slow speed thing, but it doesn't matter how easy it the trail is, if I have to bunnyhop, I will still automatically look down when I am in the air. Also, I look down on slow speed drops, but very rarely faster ones, I guess because I am not as confident when I have to accurately time the compression rather than let the speed do the work so the same sub-concious action comes into play to check I'm clearing the edge. Actually, maybe if I just spend hours and hours bunnyhopping until I am totally confident I can always pull off clearing something everytime without fail, my sub-concious may stop feeling the need to do the double-check.
MTQG - yup, that sounds like the best idea so far. I was thinking something similar this morning, that placing something the other side of the sticks to deal with after may keep me focusing ahead. Was thinking about two markers to ride between or something, but will also try your idea. That n practice may just cure me.
Ta 
popstar - I don't do it as habitually on jumps or corners, not to the same extent. Jedi is always getting feedback off me, although even he can't crack this looking down one. It's totally a subconcious habit - I know exactly why I do it, and I know when I do it, but just can't stop it (yet)!
