Step 1: Pick a Game Style
To start building your own board game you need to first need to decide what kind of board game you want to build. With immense number of board games out there it does intact seem a little daunting. However it is not impossible.
Wikipedia has a list of every board game that currently exists. Looking at this list for inspiration you can create your own board game and even develop your own unique set of rules. http://en.wikipedia.org/wiki/List_of_board_games
You could combine two of your favourite board games.
Step 2: Sketch It Out
After picking the style of your board game, the next step is to not just start craving the board and pieces. The next step is to sketch our the board and the rules.
Figuring out the look and rules of your board game will provide you with the ability to carefully craft your perfect board game. The sketches can also act as a guide during your stage when you put your board game together.
The sketch can be a detailed or simple as you want but laying out your ideas on paper will make building game easier in the long run.
Step 3: Build the Board, if needed
1) Draw it out.
Using cardboard or paper found from around your house you can design your board using simple tools such as pens, pencils, markers and paint.
2) Print it out
Using software if you have a Laptop/Tablet you can design a board for your game that can be printed out.
Step 4: Make your Pieces
After your board has been finalized you need pieces to play your game. Like the board there are a variety of options available to getting pieces for your game.
1) Use existing board game pieces or things from around the house.
There is nothing wrong with using tools already available to you. Look to your existing board games or small items around your house to find the pieces of your game
Step 5: Dice and Playing Cards
1) Think about the kind of dice required for your game.
2) Use dice from existing games you own.
3) Print or create your own.
4) Hand made cardsUsing paper, cardboard or any other household material you can produce your own playing cards. Simplicity at it's finest. I opted to make hand cut and designed cards for my game.
5) Printed Out Cards
Another option is to print out your cards. Using Microsoft word you can design your cards to be printed out on a ink printer.
Or maybe you can be creative and find existing apps that can be put to use?