Well there are two ways, and from your lack of infomation im going to assume you're talking about the vianilla game.
There are no bloody 'chairs or what ever garbage' you want to get. The only way is to get creative and make them using other blocks. Or install a furniture mod.
Check this video for an insite on what i mean. https://www.youtube.com/watch?v=U6AS1TKIzZw