Making Symbols, Fractions, Hearts, Using "Alt"
I've also included links with instructions to make hundreds of symbols... everything from hearts to "cents" signs. These instructions are for Windows. For other operating systems, a quick Google search will give you the info that you need.
For instance, a degree symbol can be made by holding the 'Alt' key in while typing 0176. Want to make a 'cents' symbol? Hold 'Alt' while typing 0162.