@Alexander Stolte,
If you can't get motivated to create a new project then maybe you shouldn't be doing that project at all.
I believe that when you are motivated to do something, that's when you do your best work, otherwise the outcome of the work can suffer and will not be as good as it should be.
It really is that simple for me, oh yes and I also enjoy creating something new for people to use, I get a huge buzz out of it thus motivation comes really easy to me, especially as I'm always learning something new with every project that I created.
In life with hardware, software, tools, machinery etc most people are users, but we are creators and we create what people use on a daily basis.
Enjoy...