You want to have a Boy ? boy
It is believed that if intercourse takes place closer to ovulation, then the probability is greater that the child will be male, due to the high motility (forward progression) and also the decreased life span of the Y carrying sperm.
If you want a boy - aim for later intercourse before ovulation - say about 1 day before ovulation. Frequent intercourse around the time of ovulation. Have your partner wear boxers. A male with a high sperm count is more likely to have a boy.