Another idea taken from MW2 - instead of getting your killstreak hardpoints (like UAV, airstrike, or chopper ), once you reach the first killstreak point, you get a carepackage dropped:
The Signal Flare Indicating the Drop Point:
The Blackhawk Drop Chopper dropping off the package:
The Package Lands:
Getting the Package:
Not only are there the usual killstreak hardpoints in the random initiation, but other "goodies" as well like extra ammo and gun clips, extra health items, and extra "new" perks only given out in the carepacakges.