Problem solving helps you to define what the problems actually are. It helps you divide the problems into smaller, and therefore more manageable parts. You can then look for solutions, options and ways forward - in other words, alternatives to stress. The following are two very effective and practical ways of approaching problem solving.
Find a "problem solving partner", someone either at home or at work who you can talk to about your problems. You will probably find that just talking it through will be very helpful, but having someone else to ask questions and give a different perspective also helps. Problems that seem huge and insoluble when rattling around in your head can seem much less complex once they are out in the open.
If you don't have a problem solving partner, or they are not available, write the problem down. Again, you'll be amazed at how the stress evaporates and how you'll be able to work through the problem to find the answer, just by getting it out of your head and onto paper.
Stress is a medical condition and it can have a serious effect on your health. If you think you are suffering from stress it is crucial that you consult a medical professional.