There are many ways to create street art, so here is a run down:
Stencils help spread your art without having to make a whole load of original artworks. It is basically a copy machine. The artist will draw their artwork onto cardboard. Then using a scalpel, they cut out the shapes that they've drawn. By drawing block shapes, they're able to cut out those shapes using the scalpel, thereby creating their artwork. Using some masking tape, they can put their stencil on the wall and use some spray paint to print the art on the wall.
Spray Paint Some artists use spray paint to create their street art. There are many different techniques, depending on what the artist is trying to create. But the essentials are a mask to ensure none of the chemicals are breathed in, a steady hand, and some kind of idea on what artwork they are trying to create.
Tags are very popular in graffiti, spreading the artist's name across ranging from a simple to complex designs.
Sanctioned Murals This type of street art is paid for by the resident of the property or the government in order to liven up the street in the area, and/or to dissuade any unwanted street art/graffiti on their walls. The design of these murals are usually up to the buyer, and the muralist is paid for the work.
Paste Up Paste ups are essentially posters that are pasted to walls using wallpaper glue. The street artist will design their art on an original poster, before printing a large amount of copies of the work.
Slap A slap is a small design that comes in the form of a sticker that is slapped on a wall, sign, door, or whatever the artist chooses, in the public environment. They will sometimes have political messages, or have more of an entertainment purpose.
Street artists pick a place where they can showcase their artwork without being lost in other people's artworks. Respect amongst other street artists is essential. Street artist's who cover other people's work is considered to be a form of disrespect, unless it's a collaboration (meaning an expansion of someone's previous artwork).
Famous Street Artists Banksy is the most famous street artist in the world with his collection of paste ups and spray paint artworks. They usually contain messages of political and/or religious issues, and are considered to be popular locations of tourists.
Ooh, someone's been naughty
Mini Graff is a popular Sydney street artist, with a lot of her artworks popping up around the Eastern Suburbs, around Newtown, Bondi, Maroubra and other surrounding areas. Graff's slaps and paste ups often question societal issues, with bright colours and a sense of irony.