DL SkyMiles has some great promotions to get status. If you have their credit card, they'll give you medallion qualifying miles for upgrading (sometimes as much as 5K or 10K, so that can be 1/3 of the way there). Also, I once had a big problem with one of their promotions so I sent them a letter about it, and they entered me in a promotion where if I flew 1 DL
leg (on ANY DL
flight in ANY class, including Exp and Song!) they would automatically put me in Silver medallion.
Needless to say, I did that (switched from B6
last minute last Christmas), and got my Silver with only 19K medallion miles to date in my account (I obviously was not going to make it on my own).
Also, the AA
silver/gold/platinum challenge is GREAT if you know you are going to be flying a few times in AA
within a short period of time. It's not advertised, so you just need to get an AA
person on the phone and asked to be entered in the "silver challenege" (for example), and they'll tell you the rules.