If you want to create a new sheet in an Excel Workbook, you can use the mouse an click next to the rightmost existing sheet. But why not use a shortcut instead?
If you want to create a chart in Excel, you can always select the data table, go to the Insert menu and choose a chart. But why not use a shortcut instead?
Select the data table and use this shortcut:
Alt + F1
You will get a chart on the same sheet in a second!