I think that the most effective way to make yourself happy is by finding your happiness in others....Helping an old man to cross the road, bringing back a smile to a crying face, getting up from your sit when you find an elderly person standing in front of you in buses and trains and allow him to sit are some of the effective ways to make yourself happy....
Sometimes we get happiness when we do things that we like doing the most and when we can't do the same it brings some sort of displeasure within us and we become sad....
Be among friends and go for some physical activities like yoga or jogging and spent some time in the arms of nature enjoying its beauty and it works for me and I hope it would work in your case also....
You will always be happy if you get satisfied with whatever you have. Satisfaction leads to happiness.Also watching your family grow and make fun gives immense pleasure and happiness.
by searching happiness in small things like playing in rain, helping others especially unknown people, distributing food in the orphanages on birthday.