Informationsverige.se is a website run by the County Administrative Boards, containing information about Sweden for asylum seekers and people who have recently been granted a residence permit.
The Swedish Institute, a public agency that promotes interest and trust in Sweden around the world, maintains several websites with useful information about life in Sweden. One of them is Hej! Welcome to Sweden!, which can help you with practical things such as health insurance and can also serve as an introduction to Sweden, culturally and socially.
Another website is Study in Sweden. This website contains practical information about planning your studies in Sweden and about moving to Sweden. It also hosts some student blogs which address more day-to-day aspects, such as groceries, lifestyle, and free time.