How can I clean out my gutters while still on the ground?
You may want to look at something like the Gutter Cleaning Wand:


You don't need to hire a professional to clean out your clogged rain gutters. Attach the Gutter Cleaner Wand to any standard garden hose, and you'll be able to clear out those debris-filled rain gutters yourself. This heavy-duty hose attachment has a telescoping wand that extends from 41.5 inches to 68.5 inches to get to those hard-to-reach spots along your roof.

Rain gutter cleaner attaches to any standard garden hose
Spray nozzle directs water flow to blast away debris
Gutter cleaning device extends to 68.5 inches to aid in reaching remote areas