You will need :
1 old book
Any colour paper or a marker
A backround picture for your backgammon
Pebbles or buttons for the pieces.
Step 1: Cutting
At first you draw with your pencil and ruler a rectangle and then you cut the lines with the cutter ( don't cut the first and last page of the book ). Like in the picture. Then glue the pages together.
You can find an other helpful guide here Turn a book to a backgammon - chess board.
Step 2: The Picture.
Find a picture you like , cut it the size of the rectangle and glue it on the first and last pages . You should use a picture with few colours so that you will not feel dizzy during the games. A picture with many colours will prevent you from seeing where are the pieces. As you can see I chose Bender ( DO THE BENDER ! :P ) from Futurama series. The figure is in the middle of the board and the rest is orange.
Step 3: The Triangles
There are two ways of making the triangles :
1. Draw them with a marker on the board ( be careful , it may leave a mark on the pages )
2. Cut black ( or any colour it matches ) triangles depending the size of the book and then glue them with glue stick.
Step 4: The Pieces
In this case I used pieces from an old backgammon to complete the game but, you can use painted pebbles or buttons in two different colours ( usually black n white ) 15 for each side . Then the dices and you're done !
GOOD LUCK !