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How to convert a libreoffice spreadsheet into a database for mail merge documents
Put all your mail merge information into a spreadsheet file (. Ods).
Put headings in the first row to serve as labels for your information. An example of headings would be the words " firstname ", " lastname ", " address ", " state and zip ".

Options:
(A). The label for all of these labels would go in the information column underneath your name. In this example, you would label everything with that name.
(B). Continue labeling all your data in the top row, in case a color bleeds or another disorder arises. Enter the table of contents at the bottom of your spreadsheet.
(C). Reuse any paper backing to fill in your preferred area. Do so by laying down divots and arrows as necessary.
(D). Fill columns with the actual data that will be merged into your document, one contact per row. The contact data should match the first row header.
(D).