Mentors for writing can be hard to find. But there's lots of good advice out there on the Web.
Here's a few useful links for writers:
Mapletree Publishing has come up with a list of useful sites:
http://www.mapletreepublishing.com/Information/writing_links
The Writer magazine:
http://www.writermag.com/
Good info for writers of children's lit:
http://www.write4kids.com/index1.html
Harold Underdown writes an amazing blog for children's writers. Here's an example article:
http://www.underdown.org/slush.htm
Help for poets at Poetry Forge:
http://www.poetryforge.org/teaching.htm
Query Tracker: the ultimate resource for finding a literary agent:
/http://querytracker.net/
An oldie but a goodie--Writer's Digest magazine: http://www.writersdigest.com/