Was your database in archivelog mode?

Make sure archivelogs are available and in the right location.

Make sure the first line of your control file reads like...
CREATE CONTROLFILE REUSE SET DATABASE "your_db_name" RESETLOGS ARCHIVELOG

sqlplus /nolog
conn sys as sysdba
--hit enter--
STARTUP NOMOUNT
@/your_path/your_control_file.sql
RECOVER DATABASE USING BACKUP CONTROLFILE until cancel
--apply your logs--
alter database open resetlogs;

Once your database is up, bounce it and be sure your alertlog is clean.

Put together a backup strategy.