Furniture can be unnecessarily expensive when it is purchased new; fortunately, there are many cheaper alternatives to the furniture retail stores.
All of the pictured furniture here was found on the side of the road or beside a dumpster, and now each piece has a happy home inside my apartment. Both the art easel and the entertainment center were in near-perfect shape, and even though the coffee table was just a frame when I found it, it became functional and beautiful after adding a tiled center. I've also received other free pieces of furniture from generous family members who were either upgrading or moving away. 
You don not have to pay a lot for furniture, sometime you don't even have to pay at all. Here are the best methods for obtaining furniture for nothing or next to it.
1) Craigslist - Free Section. If you live in or near a city that has a large Craigslist community, find the FOR SALE section and click on the 'free' sub-section. In Austin, for instance, today's free listings include a chest of drawers, couch, love seats, table & chairs, dryer, water bed, swing set, entertainment center, and a dog house -- over 74 listings so far today. 
2) Dumpster diving. Despite the term, this method does not have to involve actually going inside a dumpster. When individuals have furniture to get rid of, they often set it beside the dumpster. To locate this stuff, drive by dumpsters of local apartment complexes on good weather weekends, especially at the beginning and end of a month. Another lucrative opportunity are college apartment complexes at the end of school semesters.
3) Curb Surfing. This method is more hit or miss than dumpster diving, but it can yield higher quality pieces. To execute, simply drive through affluent neighborhoods and keep your eyes open. Once again, the best times for this are weekends with good weather. To further increase your odds, determine the day for large item pick-up in the specific neighborhoods, and go driving either the night before the pickup or early that morning before collection.
4) Ask your friends and family. It seems America is always upgrading or redecorating, which leads to furniture cast-offs and spares tucked away in attics. Even if your friends and family do not have any surplus furniture, they may know someone who does, or they will surely keep you in mind the next time they do.
5) Buy it cheaply. If you can't find it for free, you can likely find it inexpensively using the aforementioned Craigslist under the For Sale -> Furniture section. Other options include the garage sale circuit and thrift stores.
Give back: Just as you receive free furniture, consider giving some of your surplus items in return. When you need to replace or downsize an item from your lifesyle, leave it beside the dumpster, give it away to a friend, or take it to your local Goodwill.
In the past year we've 'given back' a mattress, DVD player, papasan chair, and a potted tree at the foot of our apartment's dumpster. We are fortunate (?) enough to have our bedroom window overlooking the dumpster, so it's been very interesting and fun to see how popular our items are by how fast they disappear.
And, really, where is this elusive "away" into which we throw things?" "from the good book of bartering at Yeah, Me Too Coffeeshop" -Fred Kohn