If you own an FM tuner, but the reception is sub-optimal (in my case, the tuner would not pull in a number of channels in stereo), here's a simple and cheap solution - a flat-top dipole. ~10 ft of coax cable and solder will produce a surprisingly effective antenna. Do the calculations for the exact cable length in the 2nd link before proceeding to fabricate.
The video on YouTube:
http://www.youtube.com/watch?v=KjTshXYsRss
For full bandwidth coverage, the "primary operating frequency" of 98 mHz should be entered. 98 mHz is about half-way up on the FM spectrum:
http://www.ccdxc.org/ant_calc.htm