Most common mistake is clicking on every link they can find,
i believe i was fooled this way few times but thanks god my btcs were secured.
It must be a good practice not to click any unknown URLs. Because there are lot of chances for trojan kind of malware to be injected into your computer or mobile.
I have seen many people who got resolution not to click any link even in the forum. They must be using online wallets and and not using any antivirus.But this must be a good resolution everybody needs to follow it to avoid getting into unnecessary trouble.
Keeping the wallet safe if the first thing. since Newbie is new to this and can loss the little money he has. Always use Desktop Wallet.
Best one Electrum and bread wallet.