Float left for Thumbnail image

Hi! It's me again! ;-) Question: On my Site globe-longboards.de (see "Globe The Plank Longboard Post"). I want to have thumbnail pictures. That workes fine, but the picture is above the text. But I want to have the thumbnail picture float left, so that the text is on the right and the picture is on the left! Could you tell me the CSS code for that? I tried by myself a bit, but I dont know how it workes! Kind regards