We're all going on a Summer Holiday!

Okay, well maybe not ALL of us are going on a Summer holiday... but my sister and I have decided that we are going on a holiday to Europe for three weeks in July and we are very excited. It has been 2 years since I took more than 3 days off work and a nice Summer holiday is exactly what we need.
We are going to Holland, Switzerland & Italy. Although we still have 6 weeks before we leave I can't help but daydream about our trip and think about what to pack.