The slow way is just to use their hex code. Hit Ctrl+V, then u, then type the hex code. For example, hex code 00BF will give you an inverted question mark, Â¬Ã¸. This is useful if you only very occasionally want to type one of these characters. Lists of UTF-8 character codes are available online...
June 22, 2009
Turning on Unicode Support in Vim
Article Source LinuxPlanet
The editor Vim supports Unicode natively. If your X or console keymap is set up to enter unicode characters via the keymap, it will work fine in Vim. Alternatively, there are two other ways of entering these characters.