I am used to flight short-haul flights. Usually they offer chicken or mozzarella sandwiches. 

For my next trip I fly long distance and about 8 hours. I am aware that meals will be served and I requested vegetarian meals. My request was confirmed on the website of my company. 

Do I need to ask for my special meal in the airplane or may I expect that my vegetarian meal is served without any actions by me to my seat?

Are there any other things I should take care of?