If there was one thing you could do in order to Move Fast, it would be to learn to Split your work into Small Chunks.

Product/Feature shape-up - Choose the smallest scope possible that delivers value to the customer. It’s faster to design, faster to develop, faster to fix issues, faster/easier for customers to learn, etc.

Design - Sketch the simplest/easiest/fastest design that can be changed quickly by the designer and the engineering team after the release.

Software Architecture - Split into small chunks that can be committed and deployed to Production without breaking anything. Optimize for “being able to change quickly”.

This principle of “Starting Small”, “Working in Small Batches”, “Building a Minimum Viable Product”, etc. is fundamental to building fast, learning fast, growing fast, reducing the number of mistakes/errors/bugs, and being happier in general.