Seven continents: Europe, Asia, North America, South America, Antarctica,Australia, and Africa.
Four oceans: Atlantic, Pacific, Indian, and Arctic ocean.
You may want to search for techniques, make up an acronym, creative sentence, or use power pegs to memorize the seven continents. There's even a song about the 7 continents!
Acronym Example for the four oceans: AAIP
(atlantice, artic, indian, pacific)