Originally Posted by Brendan

Transferring points to a relative or friend does not extend the expiry date of your own account nor the points remaining in it. However, the transferred points would immediately become subject to the receiver's own expiry date--without causing it to be extended.
A good way to extend expiry is to rent a car from Alamo or National, esp. with a bonus code which gives 1500 points per day. Not as easy as buying 1000 points for $7 or converting 2000 points to 200 FF miles, but so rewarding!

Does anybody know if booking a points res., then cancelling, qualifies as an activity to extend expiry?