I am sure many of you know about this site, but for those who do not it is a great site to host images. This allows creating posts with images inline with a thread (IE you can post text above and below the images). Great for when this site has issues with uploading images (or your file size is too big). Also great for making tutorials on software with screen prints.
Basically pretty easy just use the browse to upload the image from your computer then copy the image url that it gives you and paste it in your post.