Welcome to PB. I suggest you contact the PB office and get a copy of Perfect Pond which is a guide to the entire process from idea to completion. Here is a ideas link which should help with the beginning concepts.

From the archives - http://www.pondboss.com/forums/ubbthreads.php?ubb=showflat&Number=92439#Post92439. From there you can look into specifics on other threads.