You can shake your booty all your want, but this is about eggs (sorry KC and the Sunshine Band). Some really good cocktails such as the Pisco Sour include egg whites as an ingredient.  Last year I learned about dry shaking cocktails with egg whites.  Dry shaking means you put everything in the shaker except ice, shake away, then add ice, shake some more, and strain the libation into a glass. 

Thanks to my lovely wife, aka Ms. Wulf Cocktail Den, and the Tales of the Cocktail website, I recently learned about the reverse dry shake.  Why should you care about the reverse dry shake?  Because it will make your cocktails with egg whites even lighter and tastier. 

So how do you reverse dry shake?  Click here for the article.  Basically you put everything (except the egg white) and ice in a shaker, shake, strain into a glass, toss the ice, put the liquid back into the shaker, add the egg white, shake some more, and voila! I tested the process with the Black Hat.  Even though the result didn't look different, the taste difference was noticeable and quite positive.  So get some eggs, click on the protein category on the right, pick a cocktail, and reverse dry shake!