Million Mile Secrets has a good write up describing the "Two Browser Trick."

Both husband and wife would need to apply for both an AA Visa and AA Amex at approximately the same time, then meet the minimum spend ($2500 each card), resulting in 105,000 AA miles each. Then book 3 off peak tickets to Hawaii on one account and 2 off peak tickets to Hawaii on the other account (you can book flights on Alaska using AA miles which helps). Then consider applying for hotel cards such as SPG Amex, Hyatt Visa, Marriott Visa, or Chase Sapphire Preferred to help cover hotel costs.