what i do is..
... when i'm trying to write and it's not coming out, i go to the piano and let my fingers play whatever they play and it releases my stress from the writing so when i go back to the writing, the words start to flow again
and when i'm trying to compose something on the piano and i can't quite get it and the tune isn't coming, i go stop for a while and go write something and when i go back to the piano, it flows easier
and when i'm trying to create something visual, i do the same thing... if it's not coming, i stop for a while and go do something else
but the something else i do in any of these cases doesn't necessarily have to be another art form, it can be anything... like taking a walk or going to the gym or talking to a friend on the phone or cleaning the kitchen or anything...
the point is, it's not all inspiration, it's work and if you're stifled trying to do the work because the inspiration isn't coming, then there are ways to help the flow of creativity come back.... whatever works for you... but it's not a good idea to just NOT do it just because you don't feel it
artists need to keep working whether they feel it or not
you can't get from point A to point B unless you start walking there
This is a particularly painful dilemma when you are being paid for the creative work you do because your client or boss or whoever hired you to do the work, doesn't care whether you are inspired or not... they just want the product... and it's excrutiating to try to push yourself to be creative when you're not feeling especially creative at the time...
BUT... you can learn a lot from the process ... what you learn is that you can do it even if you didn't feel like it and the more you work on doing it, despite being uninspired, the more the inspiration will come as you do the work
did that make sense?