Some short-cut keys that would be really good are not included in excel. These may be short-cut keys to format your currency, to underline groups really fast or to put extra decimals in cells formatted as a percent. I have seen some people include all sorts of add-ins in their excel menu with scads of short-cut keys and other functions. I hope you agree that this is not very necessary. Instead, you can make you own customised short-cut keys. Then you will know what is going on and you will not cede control of your excel to anybody else.
The video below demonstrates how you can make your own macros. There is only one big rule here. Please place your cursor on the cell to be formatted and do not move it before you are finished recording the macro.