If you are going to write every day, what you imagine, must become a good part of what you write about. Oh my God, this is so boring. Here is some more advice from others. On thoughts and feelings. It's important to make the distinction between feelings and thoughts.
Feelings just are.
On how to get writing again. It's VERY important to ask how he is feeling, rather than what he thinks. Thinking always involves judgment and evaluation, feeling doesn't. I don't write. I might read a book, or go running, or dancing, or work on my web sites.