This isn't really a shortcut, but it's important to understand that pressing enter or return will complete a cell entry and move the cursor down by one cell. Using other keys (like the tab and arrow keys) you have the option to move the cursor in other directions after completing the entry in a cell.
Calculating a running total in an Excel table is a little tricky, because it's not obvious how to build the formula with structured references. You can easily get the current row with the @ notation, but what about the first row in a column? You might be surprised that you can use INDEX for this.
In this video, we demo how to plot results from a survey question in an Excel bar chart. Along the way, we use the COUNTIF function to build a summary table, and show a simple technique for creating an "other" bucket.
This video shows how to setup VLOOKUP with a table, and how to use the MATCH function inside VLOOKUP to generate a dynamic column index. This makes it easy to refer to columns by name inside VLOOKUP, instead of hardcoding the column number. As a bonus, you can reorder the columns and the formula will keep working correctly.