Better posture tip:
If you have bad posture when you are at your desk like I do, try replacing a chair with an exercise ball. I’ve started to use one when I’m at my computer and its helped a lot with my posture already.
As it has no back support it forces you to be more aware of the way you are sitting. I was a little concerned about my bad back without the support, but it actually helps and hurts less as my posture gets better!
They are also really really comfortable! Plus they are cheap!