Note: This is just a brief article on my personal opinions on getting into bitcoin mining.
Bitcoin Mining is one of those things – I feel you really had to get in early to do.
In order to make bitcoin mining worthwhile is to get a ASIC setup and join a Bitcoin mining pool.
For a single user using CPU or GPU power to mine – not worth it. The cost of your power usage outweighs any worthwhile mining.
Note: However you can get ASICMiner Block Erupter USB powered drives to do your mining for you – allowing you to build your own mining platform running cheaper than if you were to have your GPU working full time.