TTC Baby Boy

Hello! My hubby and I are currently TTC baby #3. We have two beautiful daughters 6 & 4 years old. We both are hoping and praying for a son this time around. When I was pregnant with my first daughter, we were told she was a boy. We were both sooo excited, had a name picked out, had the nursery decorated and even showed up to the hospital with everything blue. Needless to say we were shocked when we heard "Its a girl." With our second daughter, we knew she was a girl by the second ultrasound. We have decided to try for a boy and its time for baby number 3!! Does anyone have any tips on how to increase chances of having a baby boy? (I know these are not guaranteed, I am just curious)