As an example of how unrealistic your goal of posting any and all of the best ways to accumulate miles let me present the following. Your suggestion about UA offering 25 miles per dollar spent for FTD is nowhere near what is out there already. Had you either

1. been around FT awhile and read a couple of forums for info or:
2. searched and read the threads in the first couple pages already

You would know that the link in the xmas offer for 1500 bonus miles PLUS 30 miles per dollar spent is still active. This puts your find to shame and is readily available to purchase spafinder gift certificates btw for huge amounts of miles.