1. You have multiple hats: separate them. Split up the design tasks from the implementation tasks.
2. Know your environment, fit in your team
3. Do hero mockups before implementation
4. Use Design Briefs to keep track of raw notes and decisions.
5. Design system helps to be more productive
6. Research: focus on the 20%. 80% of what a good designer does should be usable.

We have a broad array of tools at our disposal. Use them! Only the right tool for the job.
Low fidelity can be better than no fidelity.