Booking a last minute flight can be a great way to get a cheaper flight.
Make sure before booking, you leave enough time to get the required vaccinations and visa's.
You can get more information about required vaccinations from the department of health.
Remember if you are from a European country, from the 1st January 2006 you will need a EHIC (European Health Insurance Card) to get free or reduced treatment in any EEA country or Switzerland. Why not apply for one in advance.