Don't get caught, don't get hacked!
Don't even think about serving your cookies over plaintext. Your browser and its inhabitants will thank you.
Learn more about HTTPS vs. SSL
Don't let just anyone snoop through your cookies. Use SameSite to keep them private.
Session cookies are like that one friend who always shows up uninvited. Make sure they're only there when you need them.
Understand the perils of Session Cookies
Don't store your secret identity, your secret password, or your love for pineapple pizza in cookies. That's just asking for trouble.
Why Cookies are Not a Good Idea