Another way to save adress favourites is to use the adress field in Contacts. E.g. I have added my home adress to my own Contact entry.

Whenever I click on the adress field in my Contact info Ovi Maps finds and shows my home adress and I can choose to have Ovi Maps route me home.

Since you can have multiple adresses in a Contact so you can also use this method for planning trips. E.g. create a new contact called Summer Trip and then just add all the adresses you plan to visit during the trip. It is then easy to get routing to those places by just opening your Summer Trip contact