DS so negative about everything

[millimat]

He's 13 and very lucky as he is very bright and also athletic. Most things come very easily to him.
However when anything is a bit of a challenge he goes very negative then throws a complete strop. This could be from asking him to find some new clothes to suggesting he gets his homework done to being on a family day out where he firebrand hey his own way.
How can I get him to become more positive and take challenging things to not be bad?

I mean this nicely but are you a positive person ? Positivity is learnt behaviour

I get very anxious and do see things as half empty a lot, but try not to let it show. DH is not like that. The situations where ds loses it are not when I would be negative though. He just went give things a try and shuts down so suggestions fall on deaf ears.

Praise him for effort not for being clever or talented, which will have the opposite effect to what you want (he will try less for fear of failure)

We do praise him for effort and have never pushed for him to be top or anything.

This is a tough one. I have one like this and I'm trying to get them to practice gratitude. I can't tell you whether it works as am inconsistent! But am going to give it another go. I also try to make her realise it's ok to fail as long as you get back up again. I suspect it is partly a self esteem issue too.