Hilton HHonors members can choose to earn either 25,000 bonus points after four stays or double base points for stays through Dec. 31, 2009. Registration at HiltonHHonors.com/pickoffer2009 is required prior to check-in. A maximum of 75,000 bonus points can be earned with this promotion and bonus points do not count toward VIP tier qualification. All Hilton Hotels are participating and existing reservations are eligible as long as you register for the promotion before your stay.

Bottom line: Do the math on this promotion before choosing between double points or 25,000 bonus points because you can’t change your mind after you’ve selected an offer. In general, you will earn more points if you select the 25,000 bonus points for four stays unless you have fewer than four stays planned or stay at expensive properties. For example, if you have four stays planned for a total of 10 nights at $125 per night, you’ll receive 12,500 bonus points if you choose double points compared to 25,000 bonus points for the four stays.