Another pimp for FlyerTalk....
Now that you're going to be on the "other" side of the 121 cockpit all the time, so to speak, you
definitely want to register (free) at
www.flyertalk.com. I know, I know, there are some serious airline passenger geeks on there and, I suspect, you might find yourself getting quite impatient with some of the regular posters, but there's no question you'll learn
all there is to know about a certain airline's FF program (DL's in your case, it appears).
One other idea for you, as I understand it if you pay for your car rental using a Diner's Club card DC provides your
primary insurance on the rental vehicle, including liability, unintentional property damage, etc. DC does have an annual fee (not sure what it is), so that is a downside. Speaking as an attorney, if DC is continuing to offer that deal and you're renting cars regularly - even if work is paying for it - I think it's worth it to use the DC card if for no other reason than if something happens it will likely be in another state so it should eliminate most, if not all, of the hassle. Do a search on FT for DC and car rental and you should be able to find the information and a number of posts from people who unfortunately got in accidents and had to take advantage of the insurance. Other cards may offer insurance, too, but my understanding is that they're all
secondary to your primary auto insurance.
Good luck in your new job!