Since this subject comes up a lot, maybe this could be made a sticky to help everyone. Posting pics is as easy as going to
http://photobucket.com/register.php and registering, then log in, hit the browse button, find the pic on your PC, select it by clicking it, then hit the submit button, the pic will show up in your album, you can also select multiple pics. Under the pic in your album are 3 boxes, click in the IMG box to highlight it then right-click it and choose COPY, then open another window and go to GBO to create a post, enter your text. In the location where you want the pic embedded, right-click and choose PASTE, hit the preview button and see how big the pic is, if it's too big, go to the Photobucket window, above each pic is an EDIT button, hit it and then select 75% of original and RESIZE button. Then look at the GBO page after you refresh it, the pic will be reduced some, if it's not enough, resize 75% again and repeat until it fits ok. I choose the 75% of original because that's the least you can resize and after a resize, it can't be reversed.
You can also use photo editing on your PC but it varies with web site how it displays, so I usually make my photos about 9x12 and then resize to suit the web site.
Hope this helps,
Tim