Most of those motivational posters as well as most company brochures are all gloss and empty words. De-motivational posters such the ones below are quite funny. Sarcasm can be motivational too. Or as this site that creates demotivational posters says: “Demotivators, increasing success by lowering expectations.” 

and I strongly agree with their statement regarding the (de) motivational posters:

“MOTIVATION. Psychology tells us that motivation- true, lasting motivation- can only come from within. Common sense tells us it can’t be manufactured or productized. So how is it that a multi-billion dollar industry thrives through the sale of motivational commodities and services? Because, in our world of instant gratification, people desperately want to believe that there are simple solutions to complex problems. And when desperation has disposable income, market opportunities abound.”