Kites, balloons, tossers, remote controlled planes, helicopters, slingshots. Here it is, now build it.
Ratings are based on the K.I.S.S. principle. KISS stands for Keep It Simple Stupid. (More info, Wikipedia.) A (1 / 5) means it is difficult to build. A (5 / 5) is very easy to build. Don’t kid yourself. These are all somewhat difficult to build.
DIY Balloon Aerial: Go wild. Easy (enough) to build and quite fun. Not very expensive either.
RC Helicopter Mount: If you’re confident enough with your remote controlled helicopter, you might as well slap a GoPro on it. Enjoy.
RC Plane Mount: I said earlier that all the mounts here are difficult, I lied, this one is easy to build.
Kite Aerial: With more control than using balloons, kites offer more peace of mind while flying.
Slingshot Launcher and Stabilizer: Easy blast off with an inexpensive slingshot plus wings equals a fantastic launcher.
GoPro Tosser: Probably the easiest to build, and can capture amazing shots.