Believe you can change  
An experience I had as a teenager really drove this lesson home for me, and is partly responsible for successes I’ve had since.My Dad had copy of ‘Drawing on the Right Side of the Brain’ by Betty Edwards lying around. I’d always been really bad at drawing - never progressed beyond the kids-drawing phase, got bad feedback on drawing at school, so stopped.Anyway, Edwards’s theory is that ‘bad’ drawers don’t look at the thing itself and draw its shape, they translate reality into abstract concepts first and then draw what that concept visually looks like. So I’ll look at a face, then decide I’ll draw the ‘eye’ first, query my mind to see what an ‘eye’ looks like, then draw the generic 'eye' shape that everyone draws.Whereas a skilled artist looks at the eye in front of them - which looks nothing like the standard symbol for ‘eye’ - and draws THAT.Edwards has a bunch of exercises to prove this, and one of them triggered a massive epiphany for me.She had a Picasso sketch in the book which was printed upside down on the page. Her instructions were to copy the drawing, keeping it upside down, and never naming the limb/whatever you’re drawing, and never turning your drawing right-side-up until it’s complete.I was sceptical, but decided to test her theory. So I started copying this upside-down drawing, fully expecting it to turn out even worse than usual.When I finished, I couldn't believe it. The drawing was AMAZING. It looked like someone else had done it. The figure I’d drawn looked alive.I went on to learn to draw pretty well. So after that, my mind always looked back and thought - well, if I can learn to DRAW, and I was so BAD at drawing initially, I can pretty much learn to do anything.