Hey-
There's a list on teh UF website on how to get instate tuition, but basically, change your drivers license, insurance and registration, bank accounts, declare domicile at the county courthouse of whatever county you're in (I assume alachua), and register to vote. Make sure you do it at least 360 days before the first day of your second year. From there it's all just paperwork, and it's pretty automatic to get residency.
Good luck and PM me if you have questions about UF.