Hilton is out with a new promotion that looks pretty good!
Sign up and stay at any hotel in the Hilton Portfolio September 1st – December 31st, 2015 to earn Double Points on Monday through Thursday nights and Triple Points on Friday, Saturday & Sunday nights.*
Also once I registered I saw this :
In addition to earning Double Points Monday-Thursday nights and Triple Points Friday, Saturday & Sunday nights*, you’re eligible to receive 4,000 Bonus Points on your 4th stay during the Triple Your Trip Promotion.†
Register and more information here: https://www.hiltonhhonors.com/3627_09012015/?lang=EN&WT.mc_id=zRCWAMS0US1HH2REP3FriendlyURL4CORE3627x5TripleYourTrip