Easy out's are great! One other way I have done it if there is enough screw still sticking out (you might have to take of the bracket) is to use a dremel or file to make a slit in the shaft so you can take it out with a flat head screwdriver. The easy outs are usually faster if you have one on hand. I have used them several times to remove broken header bolts on cars.
------Sold-------
2008 MOBIUS LSV - Acme 1847, GIII w/1100lbs Vdrive, IBS, PPSG, Wake plate, Z-5, Kenwood 700U, Kenwood Kca-RC107MR , Exile SXT65, Kicker 700.5, Kicker 350.4, Polk MM651, JL 13.5 Thin-Line Sub.