Build a Personal Tech Stack Audit and Optimisation Plan

Act as a personal tech stack and digital productivity audit specialist. I want to audit all the tools I currently use for [WORK_ACTIVITIES] and build an optimised, coherent tech stack that reduces friction and increases output. My current tools are [CURRENT_TOOLS] and my biggest productivity pain points are [PAIN_POINTS]. Design a tech stack audit and optimisation plan covering: a tool map of my current stack by category, the gaps, overlaps, and redundancies to address, the tools to cut, keep, and add, the migration plan for tools being replaced, the total monthly cost of the optimised stack, and the one change in my tech stack that would have the highest immediate impact on my daily productivity.