Online guide to electronics
As @Garrett said, there are a lot of beginner electronics websites out there. My favorites are:


http://www.electronics-tutorials.ws
http://www.allaboutcircuits.com
http://www.kpsec.freeuk.com/study.htm
http://www.learnabout-electronics.org/index.php
http://hyperphysics.phy-astr.gsu.edu/hbase/hframe.html -> Electricity
and Magnetism
http://www.pyroelectro.com/edu/basics/
http://tronixstuff.wordpress.com/electronics/
http://lcamtuf.coredump.cx/electronics/
http://www.renesas.com/edge_ol/engineer/index.jsp
Circuits and Electronics (6.002x) - free online electronics course from MIT