Things like practicing gratitude can be life-changing. It's those small lifestyle changes that can help you reach your goals in life. All it really takes is making a small shift, a small change in your daily routine to bring some positivity and healthy influence to your life.
Absolutely! I've been pretty happy lately but I won't pretend that I don't have my bad days like everyone else. Its ok to have a bad day. Just don't setup camp and live there! Life gets stressful. Learn your lessons and move on to better days!