I don't claim any expertise - but I use all the many hints and advice from these boards for accumulating mileage (don't fly enough for many air miles). I would suggest Business Credit Cartds - American, Delta, British Air and United all offer them - no fee for first yeat - good startup bonus - and bonus for additional cards etc. I use them all for "backup to my Starwood - although it's hard to beat the SPG service,the 5,000 bonus miles for 20,000 pts.and the ability to use with all the airline. (I don't know of any other card that will do that for such a small annual fee) I do wish however, that American Express had wider acceptance like VISA or MC.Too bad the Saving Bond perk is ending - that has helped me out a lot in accuulating miles. This year alone, I've been able to accumulate enough miles for Business and/or First Class Awards (for 2) to Tahiti,& Australia,& Thailand and am now in the process of booking to Osaka...IT's a lot of work to keep track of all the cards and bonus promotions - but it does pay off in the end. Good luck and happy spending and here's to more Double and Triple mile promotions!