During the northern summer, the days in Greenland are very long. Always make sure that you get as much sleep as you're used to, as sleep deprivation can lead to all manner of health problems.
During the summer, also watch out for the Nordic mosquitoes. Although they are not dangerous as they do not transmit any diseases, they can be irritating.
Thanks to undersea fibre optic cable links to Europe and broadband satellite, Greenland is well connected with 93% of the population having internet access. Your hotel or hosts if staying in a guesthouse or private home will likely have Wi-Fi or an internet connected PC, and all settlements have an internet cafe or some location with public Wi-Fi. Ask around if you need help finding it.
Food in Greenland is generally not that different from American or continental European tastes. Restaurants carry typical European fare. Local food can be purchased at local markets in each town. Many Greenlandic restaurants combine traditional foods locally-caught fish, shrimp and whales; also muskox and reindeer with more familiar dishes. Expect to find whale meat at a Thai restaurant and caribou in a Chinese joint. Nuuk also has several burger bars and a couple of very high-end restaurants, most notably Nipisa, which specializes in very expensive local delicacies. Prices are high everywhere, but servings are generally large, especially with fries.
The official language - Greenlandic Kalaallisut - is actually that of the more populated western coast. The eastern dialect is slightly different. Both are highly challenging languages to learn, as words are very long and often feature "swallowed" consonants. Try uteqqipugut or Ittoqqortoormiit on for size.
The good news is that almost all Greenlanders are bilingual Danish speakers, and many will even have a functional command of English. Greenlandic words may come in handy for travellers wanting to experience the "real Greenland", though.
Greenlandic is different enough from Inuktitut, the language of the Canadian Inuit who share similar historical roots to the Greenlanders, that the two peoples have difficulty understanding each other. However, attempts are being made to unify the Inuit language, and Greenlandic - with its existing libraries of translated Shakespeare and Pushkin - seems like the most natural option.
The word "Eskimo" is considered pejorative by many Arctic peoples, especially in Canada. While you may hear the word used by Greenland natives, its use should be avoided by foreigners. Use the correct term "Inuit" and when specifically referring to people in Greenland, Kalaaleq, "a Greenlander."
Kalaallit Nunaata Radioa Radio Greenland broadcasts one national radio station with a wide variety of news, music, cultural, and entertainment programs, primarily in Kalaallisut Greenlandic but some features particularly news are also in Danish.
In Nuuk only, a second frequency re-broadcasts Danmarks Radio from Copenhagen.
Kalaallit Nunaata Radioa broadcasts KNR TV nationwide, with a similarly broad selection of programs in both Greenlandic and Danish.
Many settlements have a secondary commercial television station - such as Nuuk TV and Sisimiut TV with locally produced news, current affairs and entertainment programs.
Nuuk TV also offers Nuuk TV Digital an encrypted over the air digital network available by subscription. 40 channels are available, comprised of Danish terrestrial networks DR Television, Canal+ movie channels, and several Danish and international cable networks, such as CNN, Discovery, etc... If you're staying in Nuuk and your hotel or guesthouse has Nuuk TV digital, some of these channels are in English.
Terrestrial TV networks do not broadcast around the clock. KNR Television has a breakfast news program from 6am-11am, closes down until 4pm and then signs back on for the evening program until midnight or 1am, hours are expanded slightly on weekends and may be expanded further for football or other sports coverage. The local commercial stations only broadcast in the evening. Nuuk TV Digital, however, is on the air 24 hours a day.