When you receive “A File has been shared with you” email from a client you haven’t spoken to in a few months, pick up the phone and call him before clicking that link or flagging it as spam.
I called. My client’s exact words when answering the call were, “Aidan, don’t click on that link.” His phone was exploding and the SysAdmin was already scrambled to clean up the mess. I offered my assistance if he should need it, we had a good chuckle and wished each other well. The call was less than 30 seconds.
Benefit: virus not spread and now I’m back on my client’s radar when he reminds himself, “Oh, yeah, I need to have Aidan check on that thing that’s been nagging at me…”