Ordering process advice needed, ?_POST vs. DB

[eluser]bjora857[/eluser]
I dont know what is the "best" way to this, but to me sessions was the easiest way of doing what I wanted to do.

I used $_POST to get data from one step to another and then from $_POST stored the data in session-variables. At the last step I write all data in the session-variables to the database.