In a week you'll be able to explore Guadalcanal and either Savo or Tulagi. Base yourself in Honiara and spend three days (four if you're a diver) visiting the capital and the historic sites dotted along the northern coast. Then catch a boat to Savo and settle in for a couple of days of relaxation. If you're keen on diving, opt for Tulagi, which features superb wreck dives. Another option, if your budget permits, is to skip Savo and Tulagi in favour of Tavanipupu Private Island Resort – a luxurious yet laid-back hideaway tucked in a sweet eastern corner of Guadalcanal.