You’d send your luggage ahead — if only telling those shipping services apart weren’t as difficult as finding your black rolly on the carousel. Here’s the best of what’s out there.First …What you can’t send: weapons, flammables, pets. (Duh.) Bags traveling overseas must include a copy of your passport, list of contents, and sometimes your itinerary.Advance WarningYou should send seven to ten days in advance for international (customs slows things), 24-48 hours ahead for domestic. So pack ahead. Though Luggage Express (866-744-7224) books pickups until 4 p.m. EST the day before.Kid GlovesLuggageFree (800-361-6871) arranges specific pickup times (vs. the typical 1-5 p.m. window), wraps bags in protective plastic, and notifies you of arrival by phone or e-mail. Luggage Forward (866-416-7447) allows you to track bags via PDA or cell and insures for up to $10,000.Light Packer?The Luggage Club (877-231-5131) quotes shipping fees by weight and service level. Use delayed ground (three to five days) if possible: Priority overnight is way pricier.Old ReliableFor a (relatively) cheap option, go to the source: FedEx (800-463-3339) charges based on bag weight, dimensions, and destination zip code; online tracking is easy. (Most services use them anyway.)Happier trails to you. DailyCandy Travel is now delivered on Wednesdays. If you’d rather not receive it (it’s okay, we’ll get over it), click here.