I was using the GoPro "roll bar mount" on the bottom of our tower.
I was using the settings that the camera was on when I got it out of the box. Video resolution 960, frame rate 60 FPS, field of view Wide. And since I had it hanging upside down from the tower I turned on the upside down option. All of those settings are easily controlled from the GoPro app on my iphone. (picture #2) You can even watch the video you took immediately after you take it, and preview your video while you are shooting it all from your phone. (picture #3) Basically you can control every part of the camera from your smart phone. Without a smart phone you would have to buy what is called the GoPro LCD backpack.
As far as mounts, they make one for pretty much anything you would ever need and some things that you would never dream of. I have a suction cup, head strap, roll bar mount, handle bar mount, and several other adapters. If you plan on using it in the water you will need what they call the floaty back door. Basically it is a float that you stick on the back of your waterproof camera box. I would also strongly suggest the Wasabi Power dual batteries and charger. They have great reviews and you really need more than one battery since they only last 2 hours at most.
Here is the battery pack that I got. It has a car charger and a wall charger.
I know that several guys like
@GiddYupJoe love dx.com for the accessories, and I'm not knocking dx, but I bought all of mine from amazon.com. Primarily because I didn't know that dx.com existed. But my only suggestion is to try and buy only genuine GoPro accessories because they just seem so much better than the Chinese knock offs. I got some mounts from amazon that were not true GoPro and you can easily pick out what is real and what is a knock off. And be careful of some sites offering really cheap prices, sometimes the shipping can take weeks and weeks. When I bought on Amazon I would look through all available sellers and pick ones that were in the US. They were usually just a couple of cents more expensive but I got the product in days, not weeks.
There are a lot of guys on here with a whole lot more experience using these things than I have. So if anyone sees that I said anything wrong please correct me.