Once you use those up, I suggest you try to avoid parking miles in hard expiry programs (ie, programs don't let you extend expiration). You can see a list of most hotel and airline programs, with hard expiry programs highlighted in red, in the Wikipost that's at the top of this thread:

Miles/Points that Do and Don't Expire

Losing miles to expiration may negate any benefit to collecting miles in a program that may have slightly better value.

You should only transfer into hard expiry programs when you're about to redeem, and only the amount you expect to redeem. And if that redemption doesn't work out, you should try to use up those miles first, long before they expire, even if it's not at the best value, since a poor value is way better than zero value.