For my fuel line, I rerouted it with clear polyvinyl tubing, which is available at any hardware store and costs about a dollar. I made it a little longer than stock so that when I pulled the fuel line off of the tank petcock, I could squish the fuel line up into my throttle cables, which keeps the fuel from spilling all over my motor and hands.
Another thing I did was put a nipple in my gas vent tubing just over my carbs. That way, when I take my tank off, rather than have to hold the tank with my left hand, while balancing it with my left incisor, taking care not to drag my zipper across the paint, as I wiggle my right hand around to reach the tubing, etc. all I have to do is reach just over my carbs, yank the nipple and then take the tank off in one fell swoop.
While you're at it, if you take the tank off all the time (which I'm not sure why anybody would do), consider putting some cheap plastic chrome trim around the bottom flange to protect the paint. I also put that stuff on the back/bottom of my front and rear fenders. I can't say I'm going to put it into any shows, but I swear it makes it run faster.
