OK, mosquitoes...this is what DH recommended.
Back when he was in the army, he was stationed in Panama for a few years. The mosquitoes were horrible...malaria, etc...and so he and his pals started drinking a spoonful of vinegar every day. BLECH I know...but acc to him, after a few weeks, they stopped being bitten.
No way was I doing that, but I DID start eating a dill pickle every day, and I went a good 3 or 4 years without a single bite (and in Houston, that was amazing). I stopped about a year and a half ago, and wouldn't you know...I'm getting bitten again. So I guess I'll start eating pickles again.