Probably the single biggest mistake of carrying concealed (guns and knives) is “picking.” Frequent touching or adjusting the firearm; done mainly as a reassuring gesture or adjusting after changing a position from sitting to standing.
To prevent this, the concealed carrier must:
1) Have confidence in their safe gun-handling skills, abilities, and choice of concealment garments.
2) Have a comfortable holster or sheath set-up that fits their body type.
3) Have good personal, situational, and environmental awareness, understand that someone in public is almost always observing you, and that police and criminals both pay attention.