All Hilton Honors members can enjoy a 100% bonus when they purchase at least 10,000 Hilton Honors Points before 22 October 2019 - members can purchase up to 160,000 points per calendar year. Hilton Honors Points are typically priced at USD 10 per block of 1,000 but if you choose to take advantage of this 100% Hilton Honors Points bonus, you will be able to purchase them at just USD 5 per block of 1,000 (50% savings!).
If you have not purchased any Hilton Honors Points this calendar year, you will be able to purchase up to 160,000 points (and get 320,000 points) for just USD 1,600! This can translate into incredible savings if you have a specific plan in mind (I will share my experience in a separate article but I have personally taken advantage of this 100% points bonus for an upcoming trip). Stacking this promotion with the 5th night free benefit (when you are redeeming for a free stay) is a great way to get the most bang for your buck! Do note that this promotion will run until 22 October 2019 (11:59PM ET) and points will be pointed into your accounts within 24 hours of the completed transaction (mine posted within 10 minutes).
If you are based in Singapore, the OCBC 90°N Card allows you to earn 4 miles per SGD on all eligible foreign-currency transactions charged to the card so long they post before 29 February 2020 so there is actually plenty of time (even if you do not hold the card right now). If you are thinking about getting the OCBC 90°N Card, SingSaver is currently giving you the opportunity to win S$1,000 (this is already the last week of giveaway!) when you sign-up and get approved for the card before 29 September 2019.