The very first thing that you should do is your own research. Ask yourself whether or not the project actually does something useful, whether or not they really need to use Blockchain tech/Cryptocurrency. If you look at a project and say, why are we trying to reinvent the wheel, then stay away.

However, if a project looks to actually use Blockchain/Crypto to it's advantage to offer unique features that it cannot offer without, then yes, look at it.

I'd be wary about relying on 'professional' crypto review sites as they've gotten it wrong many times. I've seen ICOs rated at 4+ (out of 5, so highly positive) turn out to be exit scams.

My best advice is, get involved in a project because you believe in it, not because you want to line your pockets. In the end, you'll get your crypto regardless, but it's easier to spot a scam if you are picky and back something you truly believe.