180s are as much for you as they are for her. It's taking stock of the things you've been doing wrong and doing the opposite of those things. It's important that you view these changes as a permanent, needed set of changes that you need to make for yourself. Because if you view them as temporary tricks to earn her back, she'll see right through it. 180's on your faults are never cheeseless tunnels.
Right. Even though I've never seen it written this way, I understand it as there are two different types of 180's. One is what AS posted above, and you never go back on these. The other is a 180 on a specific behavior which may only be temporary. These are the 180's you try for a couple weeks while you gauge the response to see if they work.
M: A really long time. Crisis: 5 years. She's still worth it.
Life is never made unbearable by circumstances, but only by lack of meaning and purpose. -Viktor Frankl