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

"It is important to be aware of cultural differences when visiting Latvia. 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 avoid wearing revealing clothing. It is also important to avoid discussing sensitive topics such as politics or religion. It is also important to be aware of local etiquette when dining, such as not starting to eat until the host has given the signal to begin. Finally, it is important to be aware of local laws and regulations and to respect them," mentioned another expat when asked about moving to Latvia.