The best way out is Hilton Honors, it's not hard to get any FF account up to 5000 and then shift to Hilton.

You just don't want to pass through HH back to another airline.

Rental Car, Hotel Partners, Idine - Safeway for UAL just Keep track, use mile tracker, and when you get to 5,000 move to the next one with orphan miles, when it is depleted dump it from your partner list and concentrate wher you want to be.