In everyday life it is very important to use awareness, just to know what thoughts are going through your mind and how this is affecting you, how it is related to emotions. So if you can really practise this, be constantly aware of this, then very slowly there can be a shift in what is happening to you.
We often say we have certain worries, we have certain problems: what happens to that worry, what happens to that problem when your thoughts are with something else? The problem may not be solved but still at that moment it is not a source of suffering. If someone close to us is sick then whenever we think about that person, that is creating the suffering, that is creating the worry, but when our thoughts are with something else that person would still be having that illness but it is not a source of suffering for us. So it shows how thinking, thoughts, are really directly related to our suffering.