Consider your likes and dislikes regarding things that you enjoy doing in your spare time. Your new hobby should make you happy. It has been said by many others that smiling is good medicine for the soul. Healthy attitudes are developed by positive thinking and doing things that make you smile.
Be sure that the activity will be an easy fit for the climate in which you live. Snow skiing in Florida would be a bit difficult but if you live in Denver it would be an attainable goal.
Consider the availability of the activity in your area. Be realistic with your expectations. If you love to scuba dive and you live in the mountains you may need to reconsider your new hobby.
Try to pick something that the person you enjoy being with would also be interested. Having a hobby partner makes it a lot more interesting. Discussion and consideration with your friend may lead to a completely different conclusion as to your new activity. Will it be an indoor activity or require a particular location?
Don't forget to do something that will fit in your budget lifestyle also. Your level of happiness will increase greatly if your budget is not strained.
Be sure that your new hobby is not stressful to you. If you have no rhythm don't try dancing or aerobics that require musicality. Stress is what you are trying to avoid to make your new past time a healthy one.Healthy attitudes are practiced daily. There is no better way to maintain a good attitude than to be involved in a hobby.