With the think-cell add-in for PowerPoint, you can create beautiful charts with just a few clicks. Some of my favorites are Gantt charts, Mekko charts and adding automatics totals to stacked columns or bars.
Organizational data types allow you to create your own rich custom data types in the Excel Ribbon. Technically you‘d create them in Power BI and have them show up in the Excel Menu of your team members. This tutorial show you what organizational data types are and you can set them up from scratch.
Don't merge cells in Excel - Don't Copy Excel sheets without updating links - Don't hide rows and columns! There are better ways of doing these things. Find out 7 things you're doing wrong in Excel and how to do it correctly.