It's all about setting and maintaining realistic expectations.
I've got a roof over my head, enough food to eat, a lovely family and some great friends.
Nobody's dropping bombs on my village, I don't have to trek 3 miles to get (dirty) water, I don't have to pledge daily allegiance to some mad dictator who thinks he's a god, I don't have to worry about my crops failing or my cattle dying and everything's pretty sweet.
When I read hotel reviews in which people are moaning because the wi-fi isn't the fastest, I want to punch them and shout "First World bollocks! Get over it!"
Simple really.