101 Learnings as a Digital Marketing Consultant

I like @Roli's recent thread here:

• 101 Ways To Annoy Potential Customers - #1 Lie By Misrepresentation

In a similar vein, let's see if we can come up with 101 Learnings as a Digital Marketing Consultant.

These are so much fun maybe we can do different series of these?

from 101 Learnings as a Digital Marketing Consultant