I've been in charge of ad takedown at my store for several months now, and here are the tactics that we've employed for a successful takedown.
1. Get a cart with 4 baskets. Put 2 where you'd normally throw your ads. This makes clean up super easy at the end of the night when you pull them out. You arent digging all the ads out by hand. Put the other 2 in the child seat. 1 of them is for fixtures, and the other is for rain check pads.
2. Make a breakout of who goes where. Try to assign people to the same sections every time. Assign a TL to seasonal because they won't get tripped up by the weird things that happen with the aisle numbers(like when the all the school supply boats where a different aisle number and none of them were labeled). Give someone who knows Pfresh the market area. They won't get tripped up by the the banana/apple/potato bunker. Assign your fastest people to the smallest sections so that they can jump over and help other sections. Then the people they help, jump over and help however is still not done after that. It's a snowball effect that works extremely well.
3. Use a PDA and not an LPDA. When you punch in what aisles you are in, It's easier and quicker to just hit the B button instead of the what you have to go through hitting number buttons several times to get the letter you want.
4. Have a holster, and do a 4ft. section at a time. Scan the whole section and then holster your PDA. Then take down the ads with both hands.
5. Regarding ads that go on peg hooks. There are two bar codes, and if you scan the wrong one, you get an error and have to hit C to continue and scan again. This is a HUGE time suck (especially if you're on the gadget wall of housewares.) One strategy is to cover the top bar code with your thumb and scan. This can be pretty effective.
Another thought about the peg hook ads is how to remove the ads from the peg hooks themselves. You can't just rip em down like normal ads. They catch, or tear, or screw up the fixture. Grab them like you'd grab a door knob, and turn counterclockwise. They come right off.
And finally, due to the fact that "Not founds" don't matter too much, I'd been not founding the peg hook ads only since they are such a pain to scan.
Hope this helps.