AIDA is very popular and I use a 5 step system that marries perfectly to AIDA.
This is is...
Introduction - headline and opener - Attention
Short story - who you are, what you are doing and why you are doing it - Interest
Presentation - biggest features after the headline and to strengthen
the benefit in the headline - Desire
Close - ask for the reader to take the desired action - Action
REHASH - this is used to consolidate the sale and reduce refunds
Yeah I know there is an extra bit but it does marry to AIDA.
Still, do you use AIDA or something else that you prefer?