Rule #2: Use lube.
As it gets colder and drier, beard oil becomes more necessary. Apply it daily to a damp beard after your shower while the skin is still relaxed from the warm water.
Rule #3: Keep it neat.
Trim off any split ends, using scissors to prevent dramatic trimming accidents. It will give you surgeon-like precision for keeping your beard looking nice.
Rule #4: Tame your ‘stache.
Use mustache wax to help train the mustache to part to the sides. This will help keep the hair out of your mouth and prevent you from chomping down on it as you eat.
Rule #5: Make it work (appropriate).
If you keep a corporate beard, be sure to trim the neck and cheek line. A good rule of thumb is to make sure neck hair ends above the Adam’s apple and with the cheek line, it doesn’t go any higher than the bottom of the nose.
source: The Manual