This is a good thread to add to read first column. We all seem to ask these questions. I like using photobucket because it's free to post your pictures there, they provide a photo shrinking tool and links that will work here. For posting a picture on this site, first create a photobucket account at www.photobucket.com .
Next click add pictures on the photobucket site, to do this, click a "browse" box it will link their site to your hard drive where you can go and upload any pictures you want, so pick a photo double click it or select "add". Click the upload button and wait. Once the picture uploads to photobucket you can resize it using the resize button on the left upper bar menu(which will appear as you move your mouse cursor over the photo that you have clicked on and are viewing there). For the picture to appear perfect on most sites like this one, resize to large or 640 x 480. Next you will notice a menu off to the right of the photo with link codes. If you highlight and copy the "IMG Code - Forums & Bulletin Boards" link and then paste it into your post, your picture will appear. Here is a hint, click the post preview button, if your picture doesn't appear, the image link may be touching another word in your posting instead of standing alone with spaces on both sides of it. Once you get the hang of it, it will only take a few seconds to post pictures that fit the forum perfectly(i.e. not huge that make you scroll back and forth. Also if you want to create an avatar or photo picture to go with your name, the resize button has an avatar size too.
Hope this helps, Steve.