Notice whenever you are lost in thoughts and bring yourself back to the present moment.
Instead of dwelling on the problem, try finding a solution.
When you get negative or anxious thoughts, flip them to positive.
Writing down your thoughts will help you reflect on them in a better way.
Breathing exercises are a great way to calm your mind and bring positive energy to it.
Observe your surroundings more and try questioning your feelings in that moment.
Realising that you have the power to make someone happy will take over your negative thoughts.