Internet

My primary interest is in selecting materials for children and teens.

A great source for information about books, materials, and services for children is the Association for Library Service to Children (ALSC) website:
http://www.ala.org/ala/mgrps/divs/alsc/index.cfm

The Young Adult Library Services Association (YALSA) website is the teen version:
http://www.ala.org/ala/mgrps/divs/yalsa/yalsa.cfm

Both websites offer awards and top pick lists of books. Both website are easily found on Google, so I won't have to worry about remembering the website addresses!