Some of the best resources that were mentioned during a Lexile training session that I attended:
Search for books on a particular Lexile level: http://www.lexile.com/fab/
Excellent games/center activities for reading sorted by grade level: http://fcrr.org/for-educators/sca.asp
Find skill or strategy lessons and novel studies sorted by Lexile: http://www.readworks.org/ Create a free account to access the most information at this site.
I hope that these resources will be helpful to you!