Amtrak Guest Rewards members who refer friends to join the Guest Rewards program between now and March 31, 2008 will earn 500 points per referral, for up to five referrals. Both you and your friend will earn 500 bonus points if the referred friend travels within 90 days of their online enrollment. You can earn up to 2,500 bonus points with the offer. Go to http://insideflyerus.wpengine.com/link/?804 to input the email addresses of your friends.

Marriott Rewards members who refer up to five friends to join the program between now and March 31, 2008 can earn up to 25,000 bonus points. You and your friend will each earn 1,000 bonus points for each stay your referred friend makes, beginning with their first paid stay, for up to five stays. So if all five of your referred friends stay five times within 365 days of their enrollment, you’ll earn 25,000 bonus points and they will earn 5,000 bonus points each. Go to http://joinmarriottrewards.com/friend to refer your friends and start earning bonus points. New members who join through the Refer a Friend program must choose Marriott Rewards points as their earning preference to earn the bonus.

Hilton HHonors members can earn up to 25,000 bonus points for referring up to 10 friends who enroll in the program and complete qualifying stays by the end of the year. You will receive 1,000 bonus points for each stay your friend makes and referred members will receive a 1,000-point bonus after completing their second stay. To qualify for the bonus points, new members must enroll and complete their stays by Dec. 31, 2008. Go to http://insideflyerus.wpengine.com/link/?805 to refer your friends.