1. Visit the site
2. Check the people if they exist on LinkedIn and if they look like genuine accounts (you can fake those too)
3. Cross-reference anything, names, companies, careers, achievements
4. Look on here and on Reddit for additional information
5. Looks at what they say. Does anything sound too good to be true? Probably is
6. Don't invest everything you've got at once
7. Use hardware wallets when you can
8. Never click/open emails from people you don't know
9. Don't fall for crypto giveaways

Some additional help for beginners!