Thinking about Artwork

I have been sitting here planning out a few of the new prints that I want to see about working on -- I have a list of all materials that I have ready to work on, plus the sizes -- So it is just a matter of figuring out what I want to do and on what type - wood, plastic, zinc, rubber or what? 

But that seems to be the hard part - because I want to make something amazing. =) Something layered, mixed media, that has a certain look and feel, but is interesting to me to create... but I can't seem to think about how to combine the different processes -and make it work the way I would like... On one side I was thinking that it is really a GOOD thing that I never really feel satisfied... It kinda makes me know that I have a bunch more to create - more to figure out and discover.... to learn to express.... 

On the OTHER side it is really frustrating... like trying to talk but then loosing your voice... then trying to force out the words... Since what is harder then that is the feeling of having a short time to create all I want to make .... And I am not sure which would be better to have this passion that makes me feel the pressure of the drive due to not feeling like a piece will be satisfying enough... or to have the satisfaction in my work that would make me feel completed when I finish a piece??? .... but might leave me without any motivation or need to keep doing more...