Mental Clutter

I realised as I was waking up this morning that I've got to try to think and work more simply.  This means decluttering negative thoughts like "I'm not good enough" and "I can't do this because" and engaging with life in a more straight forward and direct way.  I go back to college in a couple of weeks (studying counselling) so I need to sort out my college things and stop the mental clutter about putting off the work and worrying about if it's right for me to apply for the next part of the training.  I am realising that some thoughts can be like mental junk mail piling up and getting in the way of what's really important.