Just to add on the extensive list that you created, never fall for projects that offer ridiculously high rates in a short amount of return, AKA "ponzi-schemes." I have seen lots of newbies who got attracted by the interest rates that ponzi-schemes offer and they usually attract people who are not that knowledgeable on how the scam works.

Another thing, make sure that before you try a gambling website or invest in a certain project, always check their domain on whether there website is currently registered or if they are hosting it for free. It is also imperative to know on when their website was created and if such contained all the necessary information about their project. In this way, one can have a clear idea about the project whether if it is a scam or not.