Don't hesitate to shoot off an e-mail when you find a hobby or entertainment site that interests you. If you have a lot of knowledge in your favourite hobby, approach schools and colleges to encourage the youngsters to start a club. Offer your services to educate them on this. Set aside some time to pursue your interests. This will make you look forward in anticipation and keep your spirits alive.
Social service can bring a lot of satisfaction and sense of achievement.
See if there is a club near you where you can offer to do some service. Better still, start a club. You might not get a good response initially, but never give up. Try to find friends on the net whom you can correspond with about your favourite interests. But always be careful.