Creating drop log spreadsheet Rorarius help

Hi Everyone I would like to create a drop log for Rorarius in runescape using a spreadsheet; however, i do not know how to create one.  
If someone could help me or direct to a place where i can learn that would be great.  
Any feedback will help.

I would like to create it on either Excel or Google Docs.

Do you not even know how to start or is there some other specific problem?
With Excel it should be very easy. Just open the program and all the columns and rows are basically already there, you just click on one of the boxes/squares and write what you want in it. Then save the file by pressing Ctrl and S.