You only need one tool to run your business. You can use Excel for bookkeeping, inventory, salaries, invoices, project management, budgeting, presentations, pla

You only need one tool to run your business. You can use Excel for bookkeeping, inventory, salaries, invoices, project management, budgeting, presentations, planning, forecast, brainstorming, timetable, to-do list and so on. If you would use a separate app for each of these you would go insane. Easier to learn one powerful tool than hundred small ones. Take a look a talk by Joel Spolsky called You Suck at Excel. It's on YouTube. It will give you a quick glimpse into how Excel powerusers are using it and how fast you can create something useful.