How to get good photos at the beach or outdoors with sunshine?

[DeweyWatermelon]

I find that it's hard to get a good photo without squinting your eyes even if the day is partly cloudy. Even if it's away from the sun. Any ideas to avoid squinting? Also, since you're at the beach and wear no make-up, what do you suggest to minimize your skin problems from showing too much. The heat and sun seems to worsen skin problems. Do you suggest leaving foundation on for that? Thank you for your tips.