@Gilek,
Welcome to A2k. Nice to have you aboard.
I will try not to repeat the good suggestions others have made.
Some important service issues revolve around proper customer service and contact. Be sure that employees greet the customer properly by looking the customer in the eye, listen to their order properly and completely, act civilly at all times and double check the order (as well as the change). Thanking the customer as they leave EVERY TIME is an essential, too.
I feel doing these tasks insure adequate SERVICE that can lead to repeat customers. Be aware that about 90% of fast food places
fail at least one of these areas consistantly. Succeed with your employees performing these tasks and you'll have repeat customers and show a successful track record to your upper mangement.
Always keep a list of priority work areas and tasks (for you as well as for employees), checking off 'to do' items.
Keep yourself aware of tasks and their timing.
Keepthe employees on task w/o micro-managing.
Verbally priase those that adhere to the tasks but address those that fail
in prvt when you can.
Adress the team about priorities and have team meetings often.
Good luck and good business to you. Let us know how it turns out.