Tools you need to cast a spell

The most important thing you need to cast a spell is only your mind and your concetration.
you must always remember that you are dealing with powers far superior and smarter than you are.
So you must show respect,
Some other materials commonly used are:

A pentagram or other occult symbols as runes, hexagrams (also known as David's star) etc.
candles.
a good verse.(this is important) the verse must be in the form of a poem.
maybe a voodoo doll or other symbols that represent the victim.
the place:
there are many places to cast a spell.
i personally don't use my house.
some places are better to make a ritual.
like ruins of ancient temples, mountains, maybe a beach etc