You may want to save yourself a lot of time and trouble by sorting out your accommodation before leaving (see the appropriate sections for tips).
If you’re a European national and are going to Sweden with the intention of finding work there you should go to the local employment office in your home town before you leave. They will be in a position to advise you on finding employment in other EU/EEA countries.Be sure to bring any prescription medications that you will need on your trip.