Check out this article, where Lydia Crowder (aka Drywall Shorty) shares her best drywall sanding tips to enhance your sanding abilities.
GTR55-85, 9 In. Drywall Sander Kit
How To Sand Drywall Correctly - The Most Important Step- Click
3M 3-1/4 in. x 8-3/4 in. Drywall Pole Sander DRPS-009 - The Home Depot
PREENEX Electric Powered Drywall Sanding Machine W/ Dust
ZELCAN 850W Electric Power Drywall Sander with Vacuum Dust Collector, Swivel Head Extendable Variable 5-Speed LED High Visibility Wall Grinding
Drywall Shorty
VEVOR Drywall Sander 800W Brushless Motor 1000-2300RPM Variable
5 Standard Levels of Drywall Finishes
Drywall Sanding For Beginners - Decorator's forum UK