Please, do not start a thread if you don't have at least 6 related pictures to post in it.
Some basic things for /s/, in addition to the rules: http://www.4chan.org/rules#s. Please read them before posting.
If you start a thread, you post the pictures! Contributions by others are optional and nothing that can be demanded. Contribute at least 6 related pics if you start a thread.
Don't make threads for the sole purpose of a request. Do not answer request threads (you're encouraging rule violations).
Typical requests start with: "[insert random topic/theme], GO!", "Let's start a [insert random topic/theme] thread", "More of this.", "What's her name?", "Moar", "Who is this?", "Where can I find more?", "Post more!", "Need more.", "Let's have a [insert random topic/theme] thread.", "[insert random topic/theme] thread plz" and so on, while not posting pics (except the first).