Cheap eating, sleeping, transportation and internet access in Stockholm

* Eating:
Exact directions to cheap restaurants AND supermarkets.

* Transportation:

Everything about the SL bus-and-train travelcard (24hr/72hr/7days/30days)

* The rest of the on-destination practicalities:

Sleeping, internet access, phonecalls and buying all kinds of "emergency" items

Picture from stockholmsmygstyle.blogspot.com.