Although probably the best pieces of advice I have ever received came from my parents and they were many, I am going to quote two others:
The one that changed viewpoint the most: “Within the work in a company, 70% of it is human relationships” (given by a teacher of an MBA I took at EOI in Seville).
The one I like to quote often: “The pats on the back, rather in cash” (given by a colleague, former teacher in the same MBA).
Side note: “Plinky” is a service I found one day proposed by WordPress. They suggest daily topics to write about in your blog, in case you lack ideas. I find some of the suggestions interesting and this is why you will see this kind of posts from time to time.