There are some tips I would recommend. Firstly, if you are a long time gambler, take advantage of giveaways/contests that they are having. Also make use of the faucet if you're casual player. Lastly, this is not a tip, but only deposit what you can afford to lose. If you're gambling for a profit, you're in the wrong mindset and you should change it before you start.
I've realized that it's more fun to gamble for smaller amounts or with some free bonus money, than it is to gamble huge amounts and feel bad when you lose sometimes.
I've won pretty substantial amounts from the faucets on Crypto-games, biggest was 0.02 BTC from a 4200 satoshi faucet withdraw, wich is not that much in the grand scheme of things, but considering it was free, it's still nice and felt good