Mining bitcoin is tough now, only those with deep pockets need apply. If you did not get in on the ground floor of mining bitcoin there are new opportunites in mining litecoin and other scrypt coins that you may want to investigate.

In particular, there are a couple of companies that promise to ship ASIC miners for litecoin in mid 2014. Why ASICs? Well, if you use GPUs to mine scrypt coins you have to deal with the high electricity costs and heat and noise levels. ASIC miners for litecoin will cut power, heat and noise by at least one order of magnitude. The ASIC miners in development for litecoin right now will not be faster, but the lower power cost is very significant.

See the thread at Litecoin SCRYPT ASIC miners for up to date information.