General paracetamol will help with a headache but if they continue to come back try going to your local GP they will proscribe something more to help.
Less stress will always help, try using the computer/ tv less, Take some more fresh air, light exercise. I always find this helps me. Good luck
This can be like what winterdreams has said however it might be that you have regular migraines this can be cause by doing something against your normal way of life for example i used to get headaches if a went sleep earlier or later than i normally do or if you eat at a different time