Here are links to various Internet recourses dedicated to the hippie movement:

Hippyland - the largest hippie site on the Net. The site contains a collection of hundreds of counter-culture documents from the 60s, Hippie Quotes, Advice on life, love, philosophy & drugs, Event calendar and etc.

http://www.hipplanet.com/books/atoz/atoz.htm - book about hippies written by Skip Stone

http://www.hipmarket.com/index.php - the site offers a selected range of products from various vendors including Amazon.com, Calendars.com, Allposters.com and others. Here you can find cool hip things!

http://hippiedreamin.tumblr.com/; http://liohness.tumblr.com/;   - pictures!

http://leary.ru/english/ - Website, dedicated to the scientific and public activity of Dr. Timothy Leary

http://wanderling.tripod.com/castaneda.html - articles about Carlos Castaneda

http://www.wikihow.com/Be-a-Hippie - a tutorial “How to Be a Hippie”

http://www.fupa.com/games/1/Hippie.html - Free Online Hippie Games

http://www.youtube.com/watch?v=JJsEB9Xd3qQ - How to make a quick hippie costume!

http://en.wikipedia.org/wiki/List_of_films_related_to_the_hippie_subculture - films, obviously 

of course, it's just drop in the ocean of information about hippies, but it'd be useful for start :)