1. Dont click and browse non recognized site to avoid phishing.
That's the lesson I've learned after I've clicked the referral link just last week and signed up without further thinking that I was actually clicking a phishing site. They hacked my account, it was too fast and my balance was also transferred to their account. We have to be careful in opening sites to avoid situation like what I have experienced.
3. Dont put too much money on that site so if ever its really a scam, the amount it can get is minimal.
True. I also do not put high amount of money in my account. That is why the hacker only took few bucks and few coins from me and some of them are from the faucets only. Good thing I didn't deposit huge amount back then.
4. If it looks really legit, try some few games with few bets at first.
Betting can't determine if it is legit or not. But if you can withdraw your profits then it is legit. I've seen some gambling sites that wasn't able to withdraw after you have big wins.