To add to Dutchdre's list,

perhaps list the prerequisite knowledge needed to follow your tutorial,
i.e. maybe some hints as to what they should study up on before tackling
your tutorial.

I think what might benefit newbies would be if the author of the tutorials
talked about the process they went through to determine how to crack
the target, even briefly mentioning deadends that they encountered in their quest.
Well maybe alot of people wouldn't like this approach, but I think
it would be good for newbies to now and then see another reversers tactics somewhat in "action".

I've read some tut's where pictures helped, but in alot of cases
I don't think there necessary.