Calling is the quickest and best way to contact me.
Use Skype (fhteuwis) or Hangout (
Start a Hangout

You can send me an e-mail via

If you want to collaborate or set up a meeting, please check my calendar to see if my schedule permits. If you see a spot and are convinced I will enjoy the meeting, please go ahead and send me an invite by including my gmail in your meeting (in Outlook, Google or whatever).