1. Give enough personal space, do not take everything granted
Just because you're in a relationship, this doesn't mean that you need to share everything and be together always and also do not hide if something is important. Crossing the limits will make your partner think as an annoyance, maybe not on a day one but this will happen one day. A good relationship needs some private space. A good relationship will allow each other to enjoy with their friends. Do not bug your partner to share the facebook password.