The way I did it is the way I showed you before. One keyword per adgroup insures that every time someone clicks on the ad the QS goes up ever so slightly. Lots of keywords seems to dilute everything. Also have to make sure the keyword is relevant to your landing page. Google will crawl your site looking for relevancy. When I first set up my account I had awful quality scores 3/10, 4/10. Gutter cleaning is 10/10, pressure washing is 8/10, driveway cleaning is 10/10. So I don't have to bid a fortune to have my ads in the 1,2,3,4,5 position. I don;t bid for the 1st position, I try to keep it at 5 or below. The fifth position is on the top tier right in plain sight with 1-4.
Heres todays tally so far. Got about 10 calls today, setup work for Sat. and Sun. ! September is a big nastygram(HOA letters) time around here. Dirty driveways are coming in fast.
