Although it is a well known fact, there are still some people who are totally unaware that the people with whom they have the most contact and hang around will have either a positive or negative effect on their levels of self-esteem and confidence.
By replacing old negative thought patterns with new positive ones you create new neurological pathways and can literally rewire your brain. It is as simple as noticing your thoughts, identifying whether they are supportive and then choosing to change anything that might be holding you back.
When John Lennon said that life was what happened when you were busy making other plans, he was being wildly optimistic. Life, all too often, seems to be governed by the day-to-day texture of niggles, anxieties and minor worries.