Dress strategy
Dressing in clothing in light/bright colors will make you stand out more in a crowd and look more approachable.
Wear something comfortable, but which will project the impression of one serious in his work.
Timing
When you are overtly trying to sell something, for example your qualifications, do it only when you are adequately prepared, otherwise, you may create an unfavorable impression leading to the failure of the mission.
Do not interrupt a person who is known to dislike interruptions.