I had been doing them by hand like a sucker pretty much since I started here. Well no longer. Not when there are computers that can do our bidding.
http://theenemy.dk/table/Sometimes you'll want to present a lot of aligned data, for example from a spreadsheet program (like Excel, OpenOffice Calc, etc.) and it can be a pain in the neck to present it on a forum or wiki in a friendly-to-read way. Maybe you'll just want to convert it to HTML but those programs always add a lot of weird formatting.
This page is here to help you out! After five easy steps below you'll just need to copy/paste the result to where you need it posted and you'll have a nice, neat table :-)
Also: In case you were misled by the title and really wanted to make a table in meat space:
[youtube]http://www.youtube.com/watch?v=SZHlwbIBl6o[/youtube]