I got glow-in-the-dark tape. Where do I place it?
You don't want glow-in-the-dark tape -- it's only useful if you store your bike in a dark shed and need to find it. The amount of "glow" is such that it's only visible in pitch darkness -- and that's for only a few hours after it has been exposed to bright light.

What you want is called "retroreflective tape" -- it reflects light back in the same direction regardless of the angle of incidence. It essentially turns your whole bike into a bike reflector. You can also buy it in adhesive rolls. Go wild with it, put it on anything and everything on your bike -- especially things that move as the eye is more sensitive to motion. The side of the bike is particularly important since we tend to have front and rear lights, but little on the side except wheel reflectors (which often fall off).

This is some retroreflective tape that I put on the rear fender and seat stays of my commuter (I have more retro tape on the sides and front that aren't visible in this photo). Left is under normal light, right is with my camera flash.




Photos by me, released to public domain.