I went on another business trip at the end of last month and racked up a few more Delta SkyMiles. I'm now at 42,790 SkyMiles total.
In addition to my Silver Medallion status with Delta that earns me a 25% mileage bonus every trip, I found a couple of new ways to earn extra SkyMiles while traveling. I earned 300 SkyMiles for renting a car from Dollar Rent-A-Car. I almost always rent car while on business trips, but I never knew I could earn frequent flyer miles doing it. I also received ~100 SkyMiles per night staying at Howard Johnson hotels. I used to go to Holiday Inns and get points for free stays, but with the economic conditions what they are, my company has asked up to save money where we can (like cheaper hotels). I'd rather get frequent flyer miles than points towards a free night stay at Howard Johnson.
The SkyMiles really add up quick. My wife and I are flying to Hawaii next month for free using my SkyMiles (52,000 SkyMiles each ticket). I'm also close to getting Gold Medallion status which earns a 100% mileage bonus every trip.