The main thing is to do the maths first and it depends on how involved you want to be in the process, the most obvious step would be to buy your own mining hardware either GPU's for scrypt coins or ASICs for Bitcoin, both require quite an investment, you could also buy up cloud mining contracts which is a lot easier but as I'm sure people here will scream you won't get an ROI ( Return On Investment ) quickly.

As always, do the maths and look at mining calculators and so on so you can see whether you think it's actually worth getting involved or not.