Assuming you don't want to carry it inside, you can get a hitch and hitch mount rack or a roof rack and a roof rack bike carrier.
I have both, the hitch rack blocks the tailgate (spare tire hits even with the rack folded) so I tend to use the roof mount for long trips. More often than not I just put the rear seat down and put the bike inside.
I have a 1 UP USA rack that goes into the hitch. It has been the best rack I have had so far better then the Thule and Yakima's that I have used. Holds tight and can adjust to hold 1-5 bikes and folds up nice when not in use.
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