Don't Splurge on Your Stash.

As much as you might want to pack your top-dollar travel-sized shampoos, conditioners, and face creams for your rare vacation, hold off. The luxe labels will be appealing (and promising) to desperate friends looking to fix their sun-fried strands and faces. Instead, opt for drugstore buys for the week (hydrating formulas are key if you're in the sun a lot) or use nondescript, refillable bottles to package your must-have pricier potions.

Don't Forget to Plan

For trips that promise nightlife livin' just as much as daytime R&R, a little advance organization can go a long way to simplifying your (and your girlfriends') beauty packing. A week before wheels up, create a list with your travel buddies that includes your main primping essentials (like hot tools and hair pins) and divvy up the suitcase-saving responsibilities. Just remember to assign someone the task of picking up an adapter or two if you're heading out of the States.

Don't Bring a Sunscreen Spray

One of the things that makes SPF sprays so effective at blocking UV rays is the same reason you might not want to pack one for a communal vacay: They make it easier to use a lot of formula quickly. So, if you only have room for one sunblock in your bag, opt for a lotion over a spritz to ensure that you (and your forgetful gals) can stay sun savvy all weekend.

Don't Leave Out Your Essentials