The key trait here is #4, being quick to trust. Everything else is circumstantial and depends on the phishing attempt.
Other hints that the text could provide:
Always ask yourself “why would they contact me?” and “why would they contact me here?” (here = email, phone message etc.) Those two simple questions make 90% of the phishing attempts smell like rotten phish.
Look for further info. Take the Nigerian prince scam for example, on its original form; would you take it seriously if you knew that Nigeria is a republic? (No.) A websearch like “nigeria wikipedia” is pretty much a no-brain.