This week Lifehacker shows us how to not waste food, not waste money, make edible shot glasses and speed up Firefox.

Disable the Windows close button
Waste less food by shopping every two weeks
Find rooms to rent while traveling

Boxee adds Pandora, PBS and Hulu (again)
Vuze BitTorrent client converts videos for you
Transfer files directly to people over the web

Develop film with coffee and Vitamin C
Google Voice will allow number porting
Make edible shot glasses

Speed up Firefox with history size limiting
How to reduce your water use
Create, Listen and Share playlists at MixTapeMe