I think it’s great that you’re being pro-active about this, so I don’t want to sound like I’m raining on your parade, but…in answer to the question how to stop negative thoughts, some experts now say that you shouldn’t try too hard, because our emotions have such a strong hold on us. Instead, they recommend “letting go” emotionally of your negative thoughts (a bit like what they teach in meditation). The experts say you should stay calm, acknowledge that you’re having negative thoughts (instead of panicking because you’re having them) and then calmly telling yourself to let those thoughts move out of your mind. Each time the negative thoughts come back (let’s be realistic – they’re going to come back), you just repeat the process. You can then try and focus on thought replacement (replacing negative thoughts with positive ones).