Automate Territory Assignments

Automate Territory Assignments

Hello All! I would like to automate the Territory selection. For example, if you create a Potential or Account and the state is Florida, I want it to automatically know or assign Atlantic Region territory, state is California, Pacific Region, etc.  I would like to create Territories based on states and have it automated so my users don't have to select a Territory. Anybody have ideas for how to accomplish this?