Read the descriptions for your type, rank them somehow (maybe using some scale or order of preference, and maybe using this thread to record your assessment progress), then vote for your fave in the poll. I've made it multi-choice...you can vote for as few as you like.
If you don't know your type (or are not certain), then look at whichever you wish!
You will need to go to http://www.wikisocion.org/en/index.php?title=Types to get the wikisocion descriptions, otherwise the descriptions can be found here: http://www.the16types.info/vbulletin/content.php