Instructables
There are tons of free copper wire rite under your nose and you dont even know it, hidden at the widest part of a CRT television/monitor held in by springs. There is a square black cable wrapped in tape. What many people dont seem to know is that its full of magnet wire!
All you gotta do is mess up a TV and cut it out. http://www.instructables.com/id/How-to-take-apart-TV/

-=please dont comment on the dangers of taking apart TVs and such, that is discussed in the link above. this Instructable has nothing to do with taking apart TVs just an extra thing to get out of a TV when you take one apart=-
 
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Step 2: Unwind the tape

This is the hardest part as well as the most boring!
The tape usually starts where the two wires go in or sometimes about 6 inches down.
You may want to upload a YouTube video before you start because its going to take a long time!
If you want to keep the tape you could wrap it around a pencil or something.
use the scissors to cut excess tape and the two main wires but DONT cut the magnet wire!!!

Step 3: Unwind the copper

this part is more fun, but takes just as long.
do it however you want, i put the wire over my knee and turned it and wrapped at around the spool. 
As you can see Im not very good at winding the wire but thats cause it takes much to long to do it neatly. 
Different TVs will have different gauges and colors but i like the red wire best.