The best way to enhancing dream recall is keeping a dream journal. Everytime you wake up, write down some general notes on what you dreamed. You will remember your dreams better, and in the future your dreams will not "dissolve" as quickly when you wake up.
For increasing how vivid your dreams get, you should look into various lucid dreaming techniques.
Check out this site
http://www.ld4all.com to learn more about dreams and lucid dreaming in general, especially their forums. Good luck!