This site has lots of pictures of good easy techniques:
http://www.norajean.com/

Here is a favorite technique:
http://www.lindlyhaunani.com/tips/mokume.html

http://www.sculpey.com/projects_jewelry.htm

http://www.pcpolyzine.com/tutorials.html

There's lots more too, it can help to look at lampwork and ceramic
beads for ideas and inspiration.