These links are ones that I found useful in the planning process:
For General Paperwork
Information about Living in Finland
Infopankki is a repository of all kinds of information about living in Finland
Finland Forum is and online forum in English with discussions related to all aspects of moving to, and living in Finland.
Finnishcourses.fi provides a search for Finnish courses in the Helsinki, Tampere and Turku regions of Finland. While in my experience it is not comprehensive, it is a good place to start.
Kela is the Finnish Social Security System for all sorts of student assistance, living assistance, medical benefits, etc. The link is to the English version of their website
Etuovi.com provides a search for properties for sale throughout Finland.
Vuokraovi.com provides a search for rental properties throughout Finland
Oikotie provides search for residential properties, jobs, cars, office space, and other stuff for sale.