1. Walking into a person's house, be sure to take off your shoes in the hallway. You can walk around the house in your socks, but would be better to take slippers with you - this will surely make a good impression as a sign of respect for the house and its owners.
2. While driving a car, one should never drive off the road. Firstly, that's how you can get into an unpleasant situation since this is prohibited by law. Secondly, Icelanders are very concerned about the environment, which can be harmed by driving through unspoiled territories.
3. Tipping is not customary in Iceland. Therefore, it's better to refrain from leaving extra money to stuff, even if the service was excellent - you can even offend workers. Therefore, one should confine themselves to verbal praise.
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5. Icelanders like when foreigners say good things about their country. In a friendly conversation, it can be just a nice compliment, but this moment can be used to your advantage: quite often, in order to make a good service even better, one just need to sincerely praise something like the nature or culture of Iceland, and the flattered staff will work harder. The main thing is that your praises should be sincere, as fake emotions are not welcome.
6. The question "How do you like Iceland?" should be answered with alacrity, preferably with humor. An indifferent response may offend the Icelander. One should be ready for this question from the very first minute in Iceland - it is often asked here.
8. In Iceland, you can drink water from the tap. Icelanders would be surprised by the desire of tourists to buy bottled water while there is clean and tasty tap water right under their nose. That's how one can pass for fussy and arrogant.
9. You should not talk loudly, shout or make any noise in public places, except for noisy nightclubs, of course. Icelanders know: those disturbing the peace in a public place are tourists with poor manners or freaky drinker.
10. Some dishes common to Icelanders may seem disgusting or shocking to foreigners. One should not criticize food, be horrified, touch one's mouth, hold one's nose or wince - this can ruin the appetite of others and insult not only those who have prepared these dishes but also the Icelanders' national pride.
11. Icelanders love to spend their free time in thermal pools and saunas. There is a strict rule: before entering the pool and diving into the water, one must take a shower. Thanks to this strict hygienic rule, the water in natural pools remains clean - and as is well known, Icelanders take great care of the environment and the country's ecology.
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13. It's advisable to wear comfortable shoes even for a walk through the capital. Although the roads are good enough, it's still better to leave heels and narrow shoes in the hotel - in such a seemingly small town there is something to see and where to go. In uncomfortable shoes, feet get tired quickly and start to hurt - the walk will be spoiled.
14. One should not be horrified by vulgar manners of some Icelanders: here it is considered perfectly normal to burp or scratch the ear in the presence of friends, even not the close ones. Things like this should simply be ignored.
15. In Iceland, it is better to speak bad English than average Icelandic. Icelandic pronunciation is quite difficult, and sometimes locals do not understand what tourists are trying to say. So it's advised to leave any attempts to flaunt one's knowledge for the homeland. 
