Nori

To enhance its sweet delicate flavor, nori should be toasted before being used. Check the packets, as some nori available in the shops is ready-toasted. Toast sheets over a flame for a few seconds, or place on a cookie sheet and put in a hot oven for 30-60 seconds. 

Wakame 

Wakame comes in dried shreds and needs to be reconstituted before use. Soak the shreds in warm water for 2-3 minutes; drain thoroughly and use in soups, salads and stir-fries.