I second what everyone has said about posting when horny, starting out slowly etc, however there are few things I want to touch on.
Unless you are really comfortable do not include face or any identifiable marks, its very difficult for someone to say its your pic if it doesn't have your face.
For some people giving up control of images is the way, because then they cant delete it, but for some keeping control and knowing they can delete it whenever they want would be easier.
Finally everyones situation is a little different, think critically about what would actually happen if strangers got the photos? what about if friends got it? or family? If it would pose a real problem then post only in dedicated communities (like here). If it wont cause a problem then no problem.
I personally thought about this and realized that I don't care who has my pictures, and that was very freeing and exiting to realize I could post the pictures anywhere.