What screen size (7ish, 10, or 12")? How much internal storage are you looking for?
Android, IOS, or Windows operating system? This likely will be influenced by your smart phone (assumption you have one

).
Convertible (keyboard dock, generally applies to just the Windows ones) or just a tablet?
Is refurbished fine with you? It honestly should be, but I didn't go that route until I purchased a second tablet personally so I understand. This is however the best way to get the most for your money.
Do you want to get something cheaper that was good or great when it was released a year ago, or the latest and greatest?