I was up in my attic today changing some coax drops. The insulation is blown fiberglass and about 16 inches thick. I left "trails" in the insulation as I moved around, stepping from rafter to rafter. Even though I tried to limit my movements I still displaced a lot of the stuff.
Garden Rake. Fluff it up again, and even it out. Be Sure to use a NIOSH Approved Dust Mask... You really don't want that stuff getting into your lungs...