How about
How to print multiple invoices, packing slips and picking lists for the days orders, plus print the address labels.
How to easy update product stocks, including buy in costs, recommended reatial prices and selling prices.
How to add comments to a customers account, including order comments on invoices.
How to change the invoice templates.
How to add customers VAT number on B"B international sales.
There's more, but you already have loads I would imagine.