How to increase N7 number in ME3

Question

What are the different ways to increasing your N7 number in ME3?

possible duplicate of What is the maximum possible N7 level?
I don't think so, the other question only asked what the maximum number is, this one is asking for a method.
@SteveV I agree, that was my thinking when I posted both questions. I was trying hard to limit the question's scope.
Except that the questions were asked within minutes of each other, and the answer for the other question contains the answer to this one. Not to mention that you clearly already knew the answer. So I don't see the point in asking both questions.
@bwarner I knew two ways, and the promotion bonus is immediately evident. I was interested in an exhaustive answer, not guess work.

Zeno · Accepted Answer · 2012-03-14 18:04:07Z

up vote 4 down vote accepted

Increasing any class level in multiplayer (+1 for every level), or a bonus from promoting a max level class (which gives +10 N7).

answered Mar 14 '12 at 18:04

Zeno
1,40412053

kalina · Answer 2 · 2012-08-26 01:20:47Z

up vote 3 down vote

By levelling your characters and promoting them at level 20.

edited Aug 26 '12 at 1:20

kalina
22.7k2188173

answered Aug 25 '12 at 14:27

Gatecrasher79r
311

2 Answers