Arriving at 6AM on Sunday next week.

I was planning on using the shower at the KLM lounge and then heading into Amsterdam, dropping off my luggage, and then spending the day in Amsterdam before heading to another city for business meetings. I will be meeting a colleague around 1PM at the train station.

I'm looking for simple brunch/lunch/dinner ideas and maybe a canal tour or some other easy way to spend a half-day.

I've been to many of Amsterdam's museums.

It will be next week, so I'm next expecting warm weather.

Suggestions?