Basically what you do is write a letter to yourself. Obviously on the heels of New Year’s or your birthday are obviously good time for this reflection – but anytime is fine. Find a quiet place and time, and begin your letter, Dear _______ (your name here).
Then reflect over the last year (or whatever the time period has been since the last one). Think of it as a self-evaluation like what you would receive at work, with all the pros and cons – “You’ve done a great job with…” “You’ve should have worked harder at…” Think of your writing self as a fair and kindly parent or grandparent reflecting and giving advice. Finally include anything that was important to you – big changes at work or in relationship, changes you’ve noticed in yourself – more confident, more anxious – and challenges and goals for the next year – travel more, meditate, spend more time with family, learn to play guitar.