If you ever start typing out names of columns in row 1 or any row, but then realize you want them to be the name of each column you can use this shortcut to quickly update the column names.
You can now split grids into smaller grids. We've found this to be really useful for adding structure organically over time to your sheets. Deciding where to put data ahead of time can be challenging, but this allows you to type everything out, and then start to split it up into blocks where the data is more aligned or grouped together.