Oh yes, another tip I learned from a friend a few months back. If you have a good hardware in you, try waiting for a coin that you think would be a good bet for speculating. Try mining some until you reach a threshold and hold it off until it reach the markets. Then sell it for profit and try to rinse and repeat.
Low difficulty really helps you to mine those coins fast and you can earn many coins in less than a week. Just choose a coin that you think would be best to mine and try to keep some until it is released in the markets in exchange for btc.
thats mainly how this is done ^^