Generally, before dining begins, there will be a toast; during this toast make eye contact throughout and lift your glass before and after you take your first sip. After that toast, which will generally end with the word "skol," you are free to eat and drink at will. When you eat, maintain continental dining style (knife in the right hand, fork in the left), try everything, and keep your hands in sight by resting your wrists on the table.
As you finish eating, finish all the food on your plate and place your fork and knife together on the right side of your plate to indicate you are finished. Also, offering to help with the cleaning after a meal in a home is a very polite and appreciated gesture.
If dining out, every bill from a sit down restaurant in Denmark will include a service charge and this will replace any need to tip the server. If service was outstanding you may tip above this amount, but few locals will ever do this.
Drinks
Coffee and, in the winter, hot chocolate are two of the most commonly consumed beverages in Denmark, but the country also has a number of other drinks worth trying. A juice made from syrup and water is called saftevand and is a favorite among kids. Hyldeblomstsaft is also a unique drink, which is made from elderflowers. For those looking for something more familiar, juices, soft drinks, tea, and milk are all easily accessible.
Once the sun sets on the work week, many people turn to their national drink: beer. The two largest local breweries, Carlsberg and Tuborg are the most popular, but if you're out for a drink there's more to try than just the beer. Akvavit (similar to internationally popular schnapps) are also common, while "cherry herring" is a local cherry liquor worth a try. International beers, wines, and hard liquors are also available.
Generally speaking, the tap water is safe to drink in Denmark, but check with locals for any particular regional differences. Also, many people may have troubles adjusting to the local tap water, as it will most certainly be different from what your system is used to.