If you’re lucky enough to be able to take a gap year, you will get the most of it if you take care of the finances first. Working for a few months to raise the cash is a given but where you put it once earned, and which cards, insurance and mobile-phone packages you arm yourself with for your time away can be crucial to how far you get and what you can do. Slumming it in youth hostels is all part of the gappers experience but the odd treat can make the memories.