To have a happy life, it's important to be at the best conditions. Undo we aren't stressed all time, sometimes, the things of everyday can make us feel worse, and make us angrier, sader...
stress always appears when we have so much things on mind.
For Example, it is very common to see somebody stressed at the exams time, because we are worried about exams, and we haven't time to relax, because we must to study, and do homework. if we add the problems of everyday... become STRESSED.
If you stress out, you mustn't try to continue the Routine, stop and relax. go to cinema, stay at home instead of go to school... you must fight stress. because if you continue stressed, you'll start to fell more and more angrier and sader, and you start to make the things wrong.
Only remember this: stress is not bad at all. stress is the otherwise of relax, and being realxed all time isn't good too.
So, don't be relaxed, and don't be so stressed, or you would become...

STRESSED!!!
So: if you be happy, keep the stress out.