This is your change to forecast your life goals and dreams. Write the letter to your future self and then "Do The Work" to achieve your goals. It's ok to use this as a journal to your future self as well to see where you are ( You can choose when to send your letter to yourself) month to month or year to year or a special date.
When we have a life vision - it gives us something to work towards. It gives us clarity, so we can go through our days knowing we're working towards what we want. Let's win together!