I just found this article about Sweden and Swedish culture on a friend's Facebook page. It's a few months old, but it is very accurate and will continue to be very accurate for many years to come. If you plan to visit Sweden, move there or are simply curious about the country, this is a good article to read.
If you can't remember all 20 things mentioned in the article, I, personally, would try hard to remember 1, 2, 10, 12, 14 (especially 14).
Another note, if you're moving to Sweden and planning to live in an apartment complex with shared laundry facilities, please make sure to find out everything there is to know about the booking system. Some places you book a time slot, some places you book half days, some places have allocated specific days etc. Just know that an empty machine does NOT mean it is free to use. Swedish people are generally not confrontational, but if there is one thing that can turn the most mellow Swede into the green monster, it's violation of the laundry regulations. If you would fail to comply you can expect angry neighbors, neighbors holding a grudge and angry notes (which is a Swede's preferred way to solving problems).