Home airports: Newark or JFK
type of travel biz or first for pleasure, econ for work
how many miles per year? 25,000 or so
what's important: upgrades/points redemption
frequently used airlines: United/Jet Blue
I'm already a United Mileage Plus member with 18,000 miles last year; I bought more points to get to a total of 41,000.

I go from NY to CA twice a year on Jet Blue. I travel international at least once a year on United and two or three times a year domestically. When my company books a flight, they buy economy.

I try to buy all tickets on AMEX. Should I cluster all my points rewards on Amex or try to use United too?

thanks