well as stated before,and you are aware of this already. VOLUME is a key factor.
Also I noticed you said mid to late stages of tournament,that tells
me you are tightening up to much when the blinds are getting bigger or just not seeing enough flops.
I know that the books say see more early stages and tend to tighten up in mid to late stages,but I think people misunderstand that.
I think you should tighten up somewhat but not letyourself be blinded out beause you are folding everything except for A plus premiums.
I also got close but when the blinds started getting larger I always seemed to come up short.
I found that if I started pulling the trigger when in mid stages and picking up some blinds during this stage it carried me through in the bigger levels and late stages.
If you are just card dead there is nothing you can really do,except for just pick your spots and position and opponents and try to make your move and pick up some blinds or small pots.