So, as I promised to a reader, I am writing this post about how I go about deck building.
First, I consider the cards I have at my disposal. Frankly, the ideal deck is useless without the flimsy cardboard. I look for a pattern amongst the cards. Perhaps a useful mechanic, a color, a similar card type, or a combination will arise out of the collection.
From there, I create my win condition(s). How will I use these cards to win?
Then, I choose the best cards to achieve my objection and consider there usefulness. The more specific cards get put into a sideboard.
Next, I consider the mana curve. This allows for the cards to move into each other, flowing with the addition of lands. This also determines the number of lands I put into the deck.
Finally, I test it out by playing a bunch of games.
That is my strategy. :)