What Serena Cook of Deliciously Sorted doesn't know about Ibiza isn't worth a bean. Mick Jagger calls when he jets in for the weekend and needs a chef. Jemima Khan and Laura Bailey tap up her little black book when they're planning a stay. Her concierge service, which she set up 12 years ago after spending a summer on the island, is loved by those who want the inside scoop. She can arrange anything from chartering a yacht and hiring a qualified nanny to lunch at hip hangout Juan y Andrea. She's got yoga gurus on standby and can book you into places that don't ever take reservations. If you've got serious cash to splash, ask her about Tagomago, a semi-secret private island with a cliff-top, five-bed villa and a mass of outdoor space just perfect for partying. Whatever your whim, this Spanish-speaking, trouble-shooting lady will sort it.