The problem is having inspiration there when you are in the studio.
I`ve slowly learned how to get my brain into the right mode to create, but essentially the stronger the emotion you are feeling, the better the creative inspiration.
I tend to read a bit before I hit a big session, and always have an inspiring book on hand.
Also a good film, or some soundtrack music also sets the mood nicely.

Nothing more scarey than sitting in the studio having a mind totally bereft of inspiration.
There`s always that little stabbing thought "shit, will I ever be able to do anything good ever again?"