First, you are a GREAT owner. Dogs see no difference between obedience and tricks. You're engaging your dog, learning what works for him and he's seeing you as the source of FUN. Plus, you're stimulating him mentally which will make him a mellower dog and better behaved. Good for you--you rock!
Second, you want tricks? Try these:
--Crawl on his belly.
--Do a play bow (which is what dogs do when they want to play with another dog).
--Nod his head "yes" or "no" on command (very humorous as in "Spot, is Dad right?" and spot shakes his head "no").
--Cover his eyes with his paws (again, very humorous as in "Rover, what do you think of Susie's new outfit?").
--Spin in a circle (ideally, use a different word for each direction so he's learning left and right like "circle" for spin left and "spin" for spin right).
--Play dead
--Find a particular person who's hiding in the house ("Spike, go find Mommy!").
--Choose between toys on command (as in "Sport, get your jack. Now get your ball."
--Jump into your arms.
--Weave between your legs as you walk.
I use a clicker to train my dog. And Donna Duford's book taught me how to do the weave between legs and jump into my arms.
For any training, here are the tips:
--start with something your dog already does partially or naturally and build on it.
--break it down into parts and small pieces.
--be positive and reward.
--always end on a high note (so your dog doesn't dread working with you and sees "tricks" or "training" as fun).
Third, try shaping games. To do these it helps to know how to use a clicker and then train your dog (called loading the clicker). A clicker is the ideal way to train a dog (because it sends a clear, unmistakable message of "you done good!"). The best shaping game is Shirley Chong's "101 uses for a box." Using a handful of treats, a clicker and an object (a box, a ball, a vase, a piece of furniture), I train my dog to do something with it in about 10-15 minutes. I trained my dog to nudge a ball with his nose, turn a bowl upside, climb into a rocking chair, climb onto a stool and then automatically sit, lay down on top of a cinder block. Website is www.shirleychong.com
Finally, here is a website you've got to check out for inspiration. Silvia Trkman is from Slovenia and one of the top agility competitors in the world. She believes heavily in the value of doing tricks with your dog. Look at the videos and be envious. www.silvia.trkman.net