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Originally Posted by pugsley21
Family trips: All domestic travel. Disneyland/Disney World, New York, Washington DC, etc.
Leaving from Denver or Colorado Springs
I think you need to decide whether you're more interested in getting free flights or free lodging. Given the dominance of UA at both COS and DEN, you'd probably want to accrue UA miles and/or miles on another Star Alliance carrier that can be redeemed for flights on UA.
For free lodging, I would delay getting hotel cards that offer free nights as a sign-up bonus until you're ready to travel, as the free-nights bonus typically must be redeemed within one year.