I use a couple of primers (not at the same time!) - I really like the Almay Smart Shade Perfect & Correct.

My Bare Minerals one is ok, it does the job but it works better if my skin isn't really dry (like it is now), or I find it doesn't apply very easily.

But I tend to use one, when I do, my skin gets oily a little slower than usual, so I'm reapplying/blotting less often.