Read the Oghma Infinium book, then select the skill set to assign the skill gain. Go to your house, and open the bookshelf. Obtain the Oghma Infinium book, but do not read it.
This trick requires that you own a house with an alchemy lab. Please let us know about any of the content that does not work below. Most of the content below will still work on the PS4 version, but some of the exploits may have been fixed. Note: All of the content below worked on the PS3 version of the game.
