Do one thing per day. Make that thing meaningful. Commit a bugfix. Land a feature. Close a sale. Apply security patches. Write a blog post.
Do this and you will be more productive than most people.
Don't just go to meetings, and especially don't just "work". If you are currently "working", you are in a rut, your brain is idle, and you are not doing. You do not have a clearly defined objective in your mind's eye.