One indicator of how important you are in an office is the space allotted for your cubicle in relation to the total office space and other cubicles. If your place seems to be only squeezed in between two other cubicles, then you can bet are not that important to the company.
For some, this is already a reason to resign. How can one work well in a company, anyway, if he/she does not feel important at all? How can he/she work if there's not enough space to spread out and do the necessary tasks assigned to him/her with ease? However, we are in recessionary times. Finding a replacement job is not as easy as it was years ago. Resigning from a job at this point is just plain crazy.
So what can you do about it? How can you feel important? I'm not really sure. It's just probably a matter of mind conditioning. I do know how to help you maximize your cubicle space, though. By maximizing the space in your cubicle, you will hopefully be able to spread out and be more efficient.
What you can do is to get yourself a stainless steel door and partition hanger. With this in hand, you will be able to hang up additional items in your cubicle's walls, such as garments and more hangers. This will save a lot of space on your desk that can be used for more important items.
Don't feel bad about having limited office space for now. At least you still have a job and a pay check to look forward to. When this is still the condition even during the best economic conditions, then that's probably the best time to get out of there and start looking for something new.