A quick post to flag two points/miles opportunities that have emerged in the last few days, both giving 500 point bonuses.
First up, Starwood hotels are offering 500 bonus Starpoints when you stay at a Starwood hotel by 31 March 2015. You need to register, book through the SPG app, and pay with your American Express card. You can earn up to 1500 additional points this way.
Second, Hilton are offering 500 bonus airline miles per night, to anyone who stays at recently opened Hilton, Waldorf Astoria, Conrad, Curio and DoubleTree hotels, and 500 bonus airline miles per stay to anyone who stays at a recently opened Hampton or Garden Inn. The Hilton code for this is PR09EM, but it should be added automatically when you book through this link.