If the database needs to be in FULL recovery (that means you need to be able to recover all or nearly all transactions during a restore) then you must run regular transaction log backups. You should also be running regular full backups. The simplest way to do both is by creating a maintenance plans and scheduling them to run regularly. If you want to guarantee that you can recover to within 30 minutes of a failure, you should run transaction log a backup every 30 minutes.

Your maintenance plans also need to clean up old backups that are no longer necessary.

For DBs using FULL recovery model I typically run a FULL backup weekly, a DIFF backup daily, and LOG backup every 30 minutes. The maintenance plan that runs the FULL backup deletes the old DIFF backups. The one that runs the DIFF backup deletes the old LOG backups.