Hi danziam,
Many Business Schools have publicly stated that they do not consider an applicant's IR score when reviewing an application. As such, you should NOT be too concerned with the IR section. You should still try your best, but you shouldn't expend too much energy or become too stressed out by that section of the GMAT. Since IR does not contribute to your score out of 800, you should adjust your studies and Test Day plans accordingly.
GMAT assassins aren't born, they're made,
Rich