Most of all, be patient and choose wisely. You are very lucky. You are trying to make changes and get into action on day two. Many people here were on day 20 or later. I'm sure you're finding the first day or two changes a lot.
Going into some analysis now can save you from getting dragged into month 12 or 24. I rememeber first getting on the site and noticing some people that were still here 3 years after the initial problem! There are many facts to find out calmly - facts to help you understand what problems she perceives as the most critical. You or she may need support, too.
Most importantly for your situation is what my IC told me last Thurs...women frequently will say "I want out" when they are really trying to say "I want change". If you act "as if" you are going to be divorced, you'll probably be overdoing it.
Why am I telling you this...? Just reminding you that each of us are in different situations. Pick and choose our advice, and as you get into action mode and start reading, listening, and thinking, be patient.
Tonight, she may pull you close but she may also be pushing you away. This doesn't mean you're screwing up, it just means that when emotions are involved, patience and your love for her is needed now more than ever.