I tried the random scatter. This is a really good method for procrastination! I ended up with the method you said. I schedule those things now on the beginning of the week or month (or year?) and maybe add a special tag or todo keyword.

The habits method looks nice! I dont know if I can tweak the visibility of those tasks in my agenda? I dont want to display those tasks on my agenda so I would need to filter them out using its own keyword?

2015-07-16 21:18 GMT+02:00 Subhan Michael Tindall <subhan.michael@gmail.com>:

On Wed, Jul 15, 2015 at 1:19 PM Manuel Koell <man.koell@gmail.com> wrote:
How can I schedule my todo's more roughly? Say, I know I want to do it next week or in a few months but I don't know the exact date nor time to do it. I just want a way to plan more foresighted. If the week starts or the month I could always set a more accurate timestamp then. Any idea? I tried to remove the day number in a timestamp but this would destroy the timestamp.

Take a look at habits.  It has something similar IE you can set a due date for a habit to be completed for say at least 3 days, but not more than 5 days.
Not exactly what you are looking for but might be adaptable.