Tiffany Piggy Bank
I've been saying this for a long while but now I'm sure and I must share this tip with you:
Never pay in Euros at websites like Asos.com, always make the payment in the original currency. The conversion rate they have is much bigger than the one your bank is going to charge you. For example yesterday I made a purchase in the value of £48,50. If I wanted to pay in Euros, Asos was going to charge me 66€. I made the payment in Pounds and now I just checked in my online bank account that instead of that value I paid 55€, the fair price. It was quite a difference this time (17% less) so always take a look at the numbers not only for Asos but for all e-commerces.