I get to the States about twice a year on the business and much of the family's spending is based around those trips: a new pair of trainers; those Uggs my daughter has always wanted; jeans; a new iPod etc etc. The exchange rate, at least against the Euro, is still pretty good. Plan to use the dollars to buy stuff you'd be buying sooner or later at home.
P.S. your airline is definitely my favourite in business on the LA route. Keep it up. It even makes a stop in Heathrow worthwhile.