To invite people via a VisitMe, this is how to do it:
1) After registering, login via clicking on "Already a member? Log in" in the orange field on the top right at any page
2) For creating a VisitMe (and thus inviting tourists/volunteers), click on "Invite people via a VisitMe" on the homepage
3) You will see a form to fill in for adding a VisitMe. If you have questions on what to fill in at some field, click on the green round question mark at the field and you will get some more explanation.
4) After filling in the form, click on "save" and the VisitMe is ready! You will see it on the homepage under "New VisitMes"
5) You can then improve the VisitMe by clicking on the VisitMe you just created. You then can add photos, add tags, add useful links, or add comments.