Reflect on a Completed Job Search and Capture Lessons

Act as a career reflection coach. I have just completed my job search and accepted an offer. Before I start my new role I want to document the lessons from this search while they are fresh. Guide me through a structured job search retrospective covering: what worked best (channels, tactics, mindset), what wasted the most time, the single most important thing I learned about myself, the advice I would give a friend starting the same search, and what I would do in the first 2 weeks of my new role to honour the effort this search took.