The most famous thing I consider to be a basic is the Wiccan Rede, which I think is an important idea to keep on mind for all Wiccans, Witchs and Neo-Pagans.
Full Wiccan Rede
"Bide The Wiccan rede ye must, in perfect love and perfect trust.
Live and let live - fairly take and fairly give.
Cast the circle thrice about, to keep all evil spirits out.
To bind the spell every time, let the spell be spake in rhyme.
Soft of eye and light of touch - speak ye little listen much.
Deosil go by the waxing moon, - sing and dance the Wiccan rune.
Widdershines go when the moon does wane, and the werewolfs howls by the dread wolfsbane.
When the ladies moon is new, kiss the hand to her times two.
When the moon rides at her peak, then your heart's desire seek.
Heed the North's wind mighty gale, lock the door and drop the sail.
When the wind blows from the east, expect the new and set the feast.
When the west wind blows oh'er thee, depart spirits restless be.
Nine woods in the couldrons go, burn them quickly and burn them slow.
Elder be ye Lady's tree, burn it not or cursed ye'll be.
When the wheel begings to turn, let the Beltain fires burn.
When the Wheel has turned a Yule, lightly the log and let Pan rule.
Heed ye flower, bush and tree - by the lady blessed Be.
Where the rippling waters go, cast a stone and truth ye'll know.
When you are in dire need, harken not to others greed.
With the fool so season spend, or be counted as his friend.
Merry meet and Merry Part - bring trhe cheaks and warm the heart.
When missfortune is enow, where the blue star on thy brow.
True in love ever be, unless thy lover's false to thee.
Eight words the Wiccan rede fullfill,
AN YE HARM NONE, DO WHAT YE WILL."