I'm not sure this is the best way, but this is how I did it.
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Create a free account on
http://photobucket.com/Upload your photos
Make sure they are set to be viewed publicly
Copy the "IMG Code" link of the picture you want to show up in your post
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On the photobucket page you get the "IMG Code" of your uploaded picture by hovering over it and clicking on "IMG Code". If you click in the box area, it will copy the txt for you automatically. Sometimes on photobucket "IMG Code" is to the right of the picture in a small box (if you are viewing just one picture and not a bunch of thumbnails).
Then you just paste the "IMG Code" into your post. It should look something like:
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Here is my new saber, isn't it awesome???
{IMG]http://i1218.photobucket.com/albums/blah/blahblahblah/myawesomenewsaberfromultrasabers.jpg[/IMG}
Tell me what you think of it! I love it!!
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I replaced the leading and trailing "[" with "{" for demonstration purposes so that you could see what it looks like.