Excel clears content of clipboard too quickly on copy/paste operation.
Do not clear Excel's clipboard with every interim action during copy/paste operation. For example: 1) If I copy a cell's value and go to a table or pivot-table, clear a filter and then try to paste a value into the filter, the clipboard is empty. 2) If I copy a value from a cell and try to paste it when editing a query, the clipboard is empty. This costs me time and peace of mind up to a hundred times a day.