Mix a blob of this with your foundation. Works especially well with Bourjois Healthy Mix foundation - gives you a healthy glow without making you look sweaty or greasy, and lasts all day. As others have said, avoid over-powdering - tap the brush before applying, and just put it where you need it.
For eyes, keep make-up minimal. Max Factor Masterpiece liquid eyeshadow in pearl beige on your browbone and in lilac on your lids will make you look much more awake, and it's both v subtle and vv long lasting. Use a light hand with your eyeliner and mascara, and (if poss) curl your lashes before applying mascara as it will make your eyes look bigger/more open.
As somebody has said above, Benefit Boi-ing concealer is fantastic - it's very pigmented so you only need the tiniest amount, which means it and won't settle noticeably in the creases under your eyes.
Keep your make-up as minimal as possible - use a light hand with your foundation and build it up only where you really need it, as your real skin looks fresher even if it's not perfect. Real Techniques Stippling Brush or Expert Face Brush would really help with this. Blush should be quite natural-looking - I like Boots No7 in Soft Damson or Candy Pink. For lips, try Vaseline Rose Tinted Lip Balm, or just regular Carmex - you may find that going without proper lipstick adds to the fresh/youthful effect and makes you look more awake.