GENERAL

The Good Language Learner Strategies.  This site provides a short discussion on effective language learning, examples of sussessful language learners, and a list of useful, readily applicable strategies to maximize language learning.
http://www.smithworks.org/chinese/articles/strategies1.html

Second Language Learning Strategies.  This site starts with a very short and concise description of relevant research on the topic and then lists strategies and examples on how to become a sussessful language learner.
http://homepage.ntlworld.com/vivian.c/SLA/L2_learning_strategies.htm

The speech accent website
at George Mason University has an archive with a large set of speech samples from different languages, spoken by different speakers with different accents.  A good way of practicing listening comprehension.
http://accent.gmu.edu/

Virtual CALL (Computer-Assisted Language Learning) Library.
This site at the Sussex Language Institute provides information about language learning software, freeware and downloads in many languages, including English and Spanish.  l
http://www.sussex.ac.uk/languages/1-6-6.htm

Ethnologue
The web version of an encyclopedic reference work cataloging all of the world’s 6,912 known living languages, including maps. 
http://www.ethnologue.com