Beard shampoo, or any other soap intended for washing beards, is a strong recommendation for a bearded man's bathroom. Washing with normal shampoo or shower soap dries out the beard beyond measure. Beard shampoo cleans the beard, without removing vital oils from the beard. Regular use of beard shampoo also makes the beard feel and look thicker.
Start by using the beard shampoo every other day and increase the use if, for example, you do particularly dirty outdoor work or sweat every day at the gym and your beard feels dirty. Finish with conditioner to help maintain healthy beard-