...or if you arrive at the other major airport, Skavsta, you'll find the getting to-and-from facts on
this page.
Whenever I go by taxi I tend to use
this company; I don't think they're better than any other company, it's just that I know they ARE a company (there are many unauthorized drivers out there, beware) and their phone number is easy to remember:) (but there will always be a line-up of hopeful cars at an airport of course). Negotiate the price before you get in, ask around, maybe at the info desk before you leave the premises, what a fair price would be.
The one small problem - as you are worried about not being understood - is that many taxi drivers are immigrants and don't necessarily speak English. Perhaps you should prepare for that possibility by printing a map out from the internet and mark your friend's address on it, if it turns out when you're already in the car that your driver needs further directions and his map screen is out of order, as is sometimes the case;-) Here's one way of doing that:
Go to
this site. Fill out the form
like so and press HITTA (find). This will generate a new page where you'll se her name and adress and phone number. You will also see a link which says VISA P� KARTA. Click it, it means show on map. To maneuver the map, don't scroll, it's hellish, just zoom and drag if you need to. When you're pleased with your map, hit SKRIV UT (print). I can't give you any detailed info on the printing out process lingo as I don't have a printer myself, but you can always take a screen shot instead if it doesn't work out.
You'll be fine :)