Selling an update to a client who is clinging to their ages-old Plone-site is only the first of many problems you face when it comes to updates. This talk is a collection of best-practices and lessons-learned during many migrations from "cosmetic designs-changes" that ended up in complete relaunches to "minor version upgrades" that ended up in large-scale coding-horrors. Audience-participation to trade tips and tricks is highly encouraged. Topics covered include: - Explaining reasons to upgrade to humans - Why almost everything is a relaunch - "What did you do to my pixel?" - Surviving design-upgrades - Content-Migration: Tools, Tactics and Troubles - When every feature becomes a bug - What can break? - What to migrate and what you might want to loose - How to keep your own developments upgrade-safe(ish) See a video of thetalk at http://www.youtube.com/watch?v=1Qx0JALp3lQ