A FlyerTalk Posting Legend
Join Date: Sep 2009
Location: Minneapolis: DL DM charter 2.3MM
Programs: A3*Gold, SPG Plat, HyattDiamond, MarriottPP, LHW exAccess, ICI, Raffles Amb, NW PE MM, TWA Gold MM
Posts: 100,417
These are the main ways. It's much easier to get redeemable miles.
However, if you'll fly 6000 miles by the end of the year, does getting PM a few months earlier really matter?