Hi
When you have a sheet ready, you want to be new sheets to be like,
right-click on sheet tab, select 'Move or copy...' from dropdown list, check
the 'Create a copy' checkbox, and press OK. Rename newly created worksheet.
When you had any data on original sheet, you don't need on new sheets, clear
them from there (use ClearContents, not Delete!).
When you foresee that you need to add new sheets in future too, then you can
leave one such sheet without data in your workbook - you can hide it until
you need it in future.