This may help a bit on the Marketo side
http://www.slideshare.net/jdavidhill/06-managing-your-marketo-102
Breno's link is the best one.
The other thing I'd point out is to make sure your lead lifecycle is ready on the SFDC side. If you make changes before integration, things will go more smoothly in the future. But you can still make adjustments later.