What cultural faux pas should I try to avoid making in Slovakia?

"It is important to be aware of cultural differences when visiting Slovakia. It is important to be respectful of local customs and traditions. It is considered rude to be late for appointments or social engagements. It is also important to dress modestly and to avoid public displays of affection. It is also important to be aware of the local language and to avoid speaking English in public unless it is necessary. It is also important to be aware of the local cuisine and to avoid eating with your hands. Finally, it is important to be aware of the local drinking customs and to avoid drinking to excess," remarked another expat who made the move to Slovakia.