1. You do not have to tip at a restaurant - In the Netherlands the waiter and waitresses get a good salary and are not dependent on tips. After dining, if the service is really good it is usual to leave a bit of change for the one serving you, but this is usually just a small amount.
2. Greeting – If you meet someone for the first time, you can either greet them by shaking their hand. For those who You considers good or long term friends, you can greet them by 3-point kiss - that’s cheek-to-cheek-to-cheek. Greeting your neighbor or a stranger walking by is also but normal here in The Netherlands. You can say,
Hoi (Hi), Hallo (Hello) or Goedemorgen (Goodmorning), Goeiemiddag (Good afternoon) or Goeienavond (Good evening) depends on the time. When leaving the home of the Dutch, you can say Doei (goodbye) or Tot ziens (see you later).
3. Agendas, Appointments and Flowers - The Dutch love their agenda. If you want to plan a business or social meeting, it is normal that you plan this beforehand. It is not usual to just drop by for a friendly or business visit without an appointment - even if you are family.
Giving flowers is also a normal thing to do.
You can give a 3euros flower bouquet from the supermarket to a birthday celebrant as a gift and that will be wholeheartedly appreciated - they really believe in the phrase "its the thought that counts". Giving flowers can also mean a lesser romantic notion compared to other cultures. Dutch people gives flowers in every occassion you can think of or even when there is no occasion at all.