raise " Racing Pigeons " at your home.

You should acquire a hobby.

I like to predict football games.

To give you a good answer I would really want to ask you several questions.

Are you competitive?
Active?
What is the weather like in the area & do you like the outdoors?
Social or solitary?
What is your budget?
Do you have any injuries or limitations that may make some things difficult?
Do you have a room that you can use for your new hobby? (Ex a fabric room, art room, or workout room)
Do you think you would enjoy playing D&D Online with Cheapgamer & friends?
Do you have an adult education program in your area?

For example if you are active social and have a decent budget, but you are not competitive I may advise you to look into Tai Chi this is a style of martial art that is very good at developing grace and lean muscle.

If as above but you are quite competitive you could take Kempo, Judo, or another martial art with tournaments.

Knitting is a fun one because it works for a social or solitary crafter, the budget can be pretty variable too as you can knit using chopsticks and shopping bags for free or you can buy a full set of high end knitting needles and knit with silk and angora.

Answer my questions above and I will look up quite a few possibilities for you ^_^

Just search your thoughts for the kind of activity that you would enjoy doing. Once you have placed your finger on what hobbies might interest you, then do some searching on the subject. Asking friends and family members might be of help also, because many people already have hobbies and they might be able to give you some input on the subject matter.
Being that our economy is sooo bad for many people finding a hobby that does not have a huge investment might be a great place to start.

Photography is a fun and exciting hobby to get into.
http://www.flickr.com/photos/grogg/62502170/

A stamp collection can be fun and very interesting as well.
http://www.flickr.com/photos/48553408@N00/2470929602/

Choosing a craft of some kind can be a very fun hobby to get into.
http://www.flickr.com/photos/craftcreativity/1935855826/

Good luck and I hope some of these will help you out. Having a hoby can benefit us in so many ways !!

Given your other question about witnessing a mugging, I'd suggest Krav Maga as your hobby. It is fun and great exercise. The source link below is to my newly completed Mahalo page on the subject.

Here are some benefits:

It will quickly teach you how to defend yourself and others should the need ever arise. This includes defending against multiple attackers, armed attackers and more. Upper levels will even address modern day threats such as car jacking.

It will quickly get you in shape (if you aren't already in shape) and help keep you that way. I dropped 30 pounds in the first several months and in a short time became noticeably stronger and faster and significantly increased my endurance.

Every class is a bit different, so you won't get bored. Since you are continuously learning new things, the mental stimulation motivates you to go to class regularly. I get bored by repetitive gym workouts, but not with Krav Maga.

Krav Maga was designed to be used by everyone, including small young women, huge guys, older people, etc. It was originally developed as a way for Eastern European Jews to defend themselves against street violence from Nazi supporters, which was something needed for people of all ages, genders and sizes. Students in my classes include fit young men, petite women, middle aged out of shape men and even a much older man who was very overweight when he first started training. One of our female instructors looks like a sexy college co-ed yet if she was attacked by an NFL linebacker I have no doubt that she could disable him in well under a minute.

Being in shape and knowing that you can defend yourself boosts your energy, increases your self esteem and improves your looks. You'll soon find that after going to class regularly you have more energy and a desire to accomplish more, which in turn makes it easier to take on additional hobbies.

Finally, since Krav Maga is about self defense and not winning tournaments and bar fights, it seems to attract nice people. I have not yet encountered a "tough guy" attitude from a student, and people take great care not to injure each other. I train with police officers, school teachers, mothers, students, computer nerds, ex-military, salesmen and more, so it's a good cross section of society.

If this sounds like it might interest you, find a local school and go to their free one hour into class to try it out. Unlike traditional martial arts, there are no specialized clothing or belts, so you can take the class wearing comfortable workout gear. Some schools may want you to buy school T-shirts or something, but the up front equipment cost is extremely minimal.
http://www.youtube.com/watch?v=EiFH3Nb5Ulo

I think you should consider knitting. It's not just for old ladies and fuddy-duddies anymore. Knitting is a great hobby for young men and young women too. It's an inexpensive hobby that anybody can pick up, and is very relaxing allowing you to burn off stress from your week.
http://newsimg.bbc.co.uk/media/images/45002000/jpg/_45002296_manknitting_getty226.jpg

And it's portable, so even if you travel a lot on business, or are frequently on the go, you can bring your knitting with you! It's a great way to pass the time on airplanes, on quiet evenings, and even on family outings.

Plus, you'll develop a talent where you can make something tangible and beautiful for others (save money on gifts!). You can share your gifts with people in need (elderly, homeless), and it's a great skill to pass on to kids some day (your kids, nieces, nephews, grandkids, etc.).

Think about the wonderful world of knitting!
http://farm3.static.flickr.com/2134/2150775678_ec27cec02c.jpg

try rc airplanes