Make Thumbnails if you insist on posting a picture and not just a link!
If you have the image saved on your computer, just upload it to www.imgur.com; when you upload they have the option of a small or large thumbnail in addition to the image link.
Keep it to thumbnails, please. Big images wreak havoc with page layouts. - Cilraaz
Please use only http://imgur.com , most of the other sites are now amazingly slow. - Chaud
Again, thumbnails only! Anything over 800px wide WILL receive an infraction. - Cilraaz