I've jumped into playing with mining ... there are a couple of approaches that I have tried but nothing is super successful.
I dropped a few bucks on a 333MH/s miner and it doesnt make a whole lot of BTC.
Buying some GHs from CEX.IO hasnt yielded much BTC either, I have however implemented the re-investor to purchase GHS every time I receive BTC and NMC.
My CPU (3rd gen i5) is currently mining an Scrypt currency an is capable of a whopping 20MH/s
I guess it's as true with bitcoin as with everything else. You have to spend money to make money.
20 Mh/S on Scrypt is a giant speed, especially for CPU. You need like 25 GPU cards to gain such speed.