Freely printed from: https://learn.nimja.com/basics/structure_of_a_session
There are a lot of ways to structure a session. When doing sessions with someone you know, some steps may be omitted because they are similar to ones before. However, it's always important to remember which bases have to be covered before you begin.
The structure is helpful to start, but don't get too attached to it.
Recreational hypnosis doesn't have to follow this, at all. The pre-talk or framing can often lead into trance already. Fractionation is just a bunch of ups and downs and let's not even start about keeping someone in a trancy, floaty state for a longer time to do all kinds of things.
Feel free to break the rules of trance as long as you have consent.