A look that was really popular this summer was a flash of blue on the eyes. Chanel came out with some really fun mascaras. The pic below is more of an "inspirational pic", I don't think I would actually go all out like that.
I think blue can be pretty on the eyes, but it's all about moderation. No one looks good with a Mimi from the Drew Carey Show blue shadow from lash line to brow. But a little flash on the inner corner...
It looks moisturized and natural. I think I only own one, and probably 15 powder blush. Time to update my makeup wardrobe a little!
I'd also suggest switching out your flat matt lipsticks for ones with more of a shine to them, or add a gloss on top of your regular lipstick. Go for a bright color on the lips and keep the foundation and the eyes light. Glossy, dewy, moisturized... all good things for summer.