<p>If you are sure you want to go to graduate school, take the GRE's NOW! I am 34 and studying for the GRE's (took them for the first time in 1993) and I cannot believe how much the two tests are alike. If you do well on the SAT's, take the GRE's and just don't have them sent to any schools. You can always take them again after college, but I think that killing 2 birds with 1 stone will save a lot of stress later on. Just a thought.</p>
<p>Just keep in mind that GRE scores are only good for 5 years. ;)</p>