Lifehacker's got a hot pot full of Gmail tips, photography calculators, hacking up your smoke alarm and figuring out which caffeine supplement gives you the most calories.

• Lifehacker asks: what's your favorite video sharing site?
• Display both Bing and Google results so you can see which you prefer
• How to use the same Gmail account for multiple emails

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• Make your smoke alarm wake up the deepest sleepers
• Golden Hour Calculator shows the best times for photography
• A 10-piece nesting cookware is something we'd buy

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• Windows Live Movie Maker leaves beta
• How to crack an egg with only one hand
• Buzz vs. Bulge Chart compares caffeine to calories

• Enjoy homemade butter in less than five minutes. I could enjoy that much homemade butter in five minutes, but I wouldn't be here the next day
• Turn Google Voice into a Growl-friendly Mac App. Plus dock notifications!
• The Attic Playground

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