I always thought these were a joke when they came out but they are a beast when cutting glass. Home depot, menards, and Lowes all have them. The 3/4 round blade works for most jobs.

I use a 4 1/2" cutoff wheel: http://www.harborfreight.com/4-12-in...der-69645.html

Die grinder with 1/8" cutting bits: http://www.harborfreight.com/1-4-qua...der-92144.html
http://www.harborfreight.com/3-pack-...its-93451.html

Multi-tool: http://www.harborfreight.com/oscilla...ool-62279.html