Another good way is to actually "take apart/look under the hood" some of the included Particle and Replicator presets included in Motion (in the Inspector) to figure out how the Motion software team created some of the dazzling effects (some of it is initially counter-intuitive, it took me awhile to see how they were able to create some slick-looking abstract patterns with just simple elements).
One of the things I've done is to go through the tutorials (listed above) and save the finished tutorial as a custom template. This way I don't have to keep going back to the source to find what I need, I can use one of my templates and either just change the files that are in it, or use it as a guide for creating something new. Bottom line though, do the tutorials. They are some of the most useful tools out there. The guys/gals who spent the time to create them should be given awards, especially since many of them don't even charge for them!
"If God could do the tricks we can do, He'd be a happy Man." - Peter O'Toole - "The Stuntman"
Machine Model: Power Mac G5
CPU Type: PowerPC G5 (3.0)
Number Of CPUs: 2
CPU Speed: 2.5 GHz
L2 Cache (per CPU): 512 KB
Memory: 4.5 GB
Final Cut Studio (Not Universal, yet)