I think any practice that gets you in the habit of creating is a good one. Only you can answer the question if doing a daily tapestry diary is the thing for you, but it is one way to get yourself going to your loom every day of the year. (Or make your own rules! Maybe you weave one bit every Sunday morning or once a month.)
I think the quesiton to ask yourself is do you have a practice of creating regularly right now? If you do, then another thing to do might not be the answer for you. But if you have difficulty making time to create on a regular basis, then making some rules for yourself around it might be helpful. A tapestry diary is one way to do that.