The feeling of optimism, usually can be inculcated from inside. Its somewhere within ourselves. A little exploring can do wonders in ones life along with right training, in right direction at right time. Positive energies works as a shower that refreshes our body, mind & soul after a hectic workout. We cannot capture these energies but can make an effort to be in the lap of these forces, so that we can be nurtured under the shade of high flow radiations. 

90 out of 100, are blessed with active minds & undaunted spirit.  

Positive vibrations in such cases act as a wiper & washes our mind with fresh inflow of thoughts. Each individual in general wants happiness around. When we are joyful and content, competence and excellence follow.

But for soon after your first condition to happiness is satisfied, another crops up. This process goes on till you lose in the bargain exactly what you sought- happiness. Life is too short for postponement of happiness. Without relying on the next instance, you have to be blissful now, your joy has to be unconditional. It is not based on the presence or absence of something or somebody in your life. If you make an unconditional commitment to happiness, that 'today, as I am, whatsoever life offers me, I am happy, I am content', then desirable situations may or may not follow, but you will be happy. And you would have achieved a prime purpose of this life, in the present moment ! !