Here is a link to 50 Stunning Examples of Reflections.
http://www.smashingmagazine.com/2008/11/30/50-beautiful-examples-of-reflections-photography/
Another resource is 100+ Creative Examples of Reflections in Photography.
http://photography.tutsplus.com/articles/100-creative-examples-of-reflections-in-photography--photo-6722
The article, Quick Tips: 4 Steps to Remarkable Reflection Photography, has ideas for creating your own reflections and finding them.
http://photography.tutsplus.com/articles/quick-tip-4-steps-to-remarkable-reflection-photography--photo-4358
If you would like a text version of adding a reflection, please visit How to Create a Reflection in Photoshop in 6 Easy Steps at http://digital-photography-school.com/how-to-create-a-reflection-in-photoshop-in-6-easy-steps/