Decade = You spin around the scooter without the deck moving.
Truckdriver = 360 barspin at the same time.
Just learn barspins, tailwhips, manuals. Throw those into 180 and 360 combos. learn fakie tricks, halfcab tricks. Build a kicker to try to learn tricks off of. Learn grinds. Learn those wierd ass tricks like downside whips, cali sliders, nose pivot 360s etc.
Most of all learn tailwhips a lot.