there is a 'trade magazine' to pick up for lots of information, advice, inspiration and resources...it is called "Machine Quilting Unlimited"
also there are books of continuous line quilting patterns--a few i own...
"show me how to create Quilting Designs-by Kathy Sandbach"
"add-a-line Continuous quilting Patterns by Janie Donaldson"
"follow-the-line quilting designs by Mary Covey"
and last but far from least...the one every long-armer should have...
"LONG-ARM MACHINE QUILTING The complete guide to choosing, using, and maintaining a long-arm machine By Carol A. Thelen" available from "That Patchwork Place"
i still 10 years later pull this book out on a fairly regular basis...it covers EVERYTHING!