The default FOV is rather low and annoying, I would like to increase the viewing angle up to something like 100, how do I do so?
Go to your My Documents -> My Games -> Skyrim -> skyrim
Create a backup of the skyrim.ini file in case you need to change back later.
Open the file, then scroll down to where it says [General] (for me it was at the top of the file).
At the bottom of this section, add fdefaultfov=XX (where XX is the FOV value you want to change to), in your case it sounds like you want it to be 100.
Save, exit, and play!