You can save a lot of money and get good rewards and discounts on your trip if you can plan ahead. One thing that can help you along the way is credit cards. As long as you don’t spend more then you have, you should be able to get some good help on the way!
We got one credit card through the Swedish food store company Coop and one from British Airways. We choose these two because they together (1) give us free withdrawals around the world, (2) are from different card companies (Master Card and Visa) which give us more possibilities to pay at different locations worldwide and (3) collect Avios points for discounted or free flights, insurance and more.