This guide is valid as of December 23, 2012 and subject to change when Julep updates their website.
You want to skip a month with Julep? Really?! Well if you're sure about it you have a small window of opportunity before you're charged for the next month. From Julep's FAQs.
How do I avoid being charged for a month?
Log in to your account between the 20th and 24th and choose Skip a Month, or cancel by the 24th at 11:59pm PST to avoid being charged on the 27th. If you cancel your Julep Maven subscription before your first box has shipped, we stop all orders in your account which have not shipped.
Step 1: Go to Julep's website and click on Log In.
Step 2: In your profile click on My Maven Subscription above, "Hello, your name!"
Step 3: You'll see your current style which you can change by selecting "Try a new style" or scroll down....
... to where it's written, "Save Your Selections.... Skip _____" don't forget to click SAVE otherwise you won't skip (or if you changed your style or added on anything it won't have saved those either unless you click SAVE).
Remember you only have between the 20th and 24th of each month to skip or change your style otherwise you'll get your normal style.