How can I be always happy?

Nobody is happy all of the time! A more reasonable goal is to be happy whenever your outlook may be grim. Still, it's important to set sustainable, reasonable goals to avoid getting down on yourself for not achieving what you want. For instance, if you want to lose weight, do not look at a huge amount of weight you may need to lose. Set your goal for losing only 10 pounds (4.5 kg). This is easier to accomplish, and it's much more difficult to lose 50 pounds (23 kg) at once. Keep setting the goal for only another 10 pounds (4.5 kg), and you’ll eventually reach your goal.