Hello,
When looking for a small switching power supply module at the website of Murata I found this:
http://www.murata.com/products/emicon_fun/index.html (http://www.murata.com/products/emicon_fun/index.html)
They have some lessons about how capacitors and inductors work.
Of course, as they make caps and coils it's a bit self promotion but the lessons look quite useful.
Caps: http://www.murata.com/products/emicon_f ... index.html (http://www.murata.com/products/emicon_fun/capacitor/index.html)
Coils: http://www.murata.com/products/emicon_f ... index.html (http://www.murata.com/products/emicon_fun/inductor/index.html)
I guessed, why not share it :)