Glass seems to be everywhere!

, but what part is best and how does one get it out of the bottle, jar, tv/monitor screen to start working it? I have not had much experience cutting glass - I do know the glass has to be empty. I assume once you have a suitable piece, you chip and flake away everything that doesn't look like what you want to make

. I'm sure this has been asked before, but I haven't seen any posts or instructions.
Hawkdancer
When all else fails - read the directions!