You can change your brain by how you use it. In this lovely book the author has distilled a mixture of neuroscience, psychology and mindfulness into 52 simple yet powerful daily mental practices. You can work through the book focusing on one topic a week, or just pick one that you fancy - no rules here. The idea is to do something from the book each day as it is daily practice that brings development and change.
Each short and easy to read chapter starts with a title like 'Be Mindful', 'Aspire without attachment', or 'Respond, don't react', then has some very pertinent background information, which really helps with the following section on how to do it in a short daily practice. The book's simplicity and kindliness make it very accessible and therefore powerful in bringing about helpful change. I suggest keeping it to hand so that you see it and dip in often [daily].