Originally Posted by SJS58

I'll start off with a few quick things I've done to help accumulate points with both programs.

American Airlines

opinionplace.com - has given me 75-250 miles for doing surveys
erewards.com - collect points and turn them into 2000 AA miles
citi credit cards - 25K miles(give or take) and they seem to allow churning of cards if you want to try it.
SPG points transfer - Transfer 20K starwood points for 25K miles...or after our Capetown stay, we turned in 60K starwood points for free nights plus 50K AA miles.

Delta
Erewards.com - same as above
SPG - same as above
Delta AMEX - Various miles, 25K(give or take) special bonuses
Bonuses..bonuses... Watch Delta for partner bonuses, transfer bonuses, etc. Last December turned in 20K Starwood points and my wife ended up with 62,500 delta miles. Car rental bonuses and promotions. Watch flyertalk for various options.

Hopefully a good start to more ideas...