Studying my route on good computer mapping software sometimes makes me overconfident.

Things look totally different in real life. I don't have a bike compass (I just ordered one on Nashbar yesterday though) so in some instances I have spent considerable amounts of time riding off in the wrong direction and having to ride back the other way.

I like to wander intentionally on my bike sometimes, but I don't like not feeling in control of how long my ride is and I don't like being lost when I'm worn out or hungry.