Good article.
One omission is - "Double Dip if rerouted through another carrier". On United, fill out a form to get mileage credit for the flight. Also get miles on the other carrier's flight.
I like United's vouchers, because one can use them to get a flight which earns miles. BTW - this was an ok year for me, I netted $900 in vouchers over 3 bumps. I just used one for a last minute Christmas week travel - the fare was $363 ($350 in vouchers and $13 charged to Diners Club) and I am getting about 9K in miles including PE bonus and booking with United connection on PC to get the 250 mile bonus per segment (and more miles if they give me the additional 3K bonus for the first online booking). I almost ended up getting a $300 voucher on the trip because they downsized from the original plane, but it turned out they did not need any volunteers (the article says that no compensation need be paid in this situation, but this was clearly not so in my case). On United, I have not had a problem combining vouchers from two different bumps, and using them in conjunction with coupons.
For this trip, I also tried a Priceline bid of $230 plus taxes plus $5 fee (though to a different airport - which is not served by United) which was rejected. I did not like that they waited several hours (not the one hour they claim) before rejecting my bid. Also I do not like the way Priceline does not include taxes and their fees in the bid (Expedia does that).
I also tried getting a FF ticket through Delta, but they did not have the dates I wanted and one of the legs was a 3 segment roundabout journey.