I've also heard that they now ask you to wait until you're 23 if you aren't getting married or going on a mission. Bishops and SPs can make exceptions, of course, but I think they probably won't unless there's a very compelling reason. People used to be able to go through when they were younger, but that obviously wasn't working out anymore, for one reason or another. Sister Beck said, "Recent instruction from the First Presidency clarifies the policy for obtaining temple recommends and receiving endowments. It was reiterated that receiving one’s temple endowment is a serious matter that should be extended only to those who are sufficiently prepared and mature enough to keep the covenants they enter into. They also affirmed that single members in their late teens or early twenties who have not received a mission call or who are not engaged to be married in the temple should not be recommended to the temple for their own endowment. Every member who is 12 or older can, however, receive a Limited-Use Recommend to perform baptisms for the dead." (Here) Going to the temple is a bigger commitment than buying a house, buying a car, joining the military, joining a sorority, bringing home a pet--it's a bigger committment than anything else we can do except maybe temple marriage and parenthood. It promises more blessings than anything else, except maybe marriage and parenthood--but it is a compete commitment. The temple is beautiful and everyone in the world should go--but there's absolutely no reason to rush it. But I sympathise so, so much with the longings to go to the temple. At one point, it got so hard for me to wait that I actually had to put these two quotes on my wall and read them every day to help me keep my perspective. I think I was about sixteen or seventeen when I put them on my wall; I tried to prepare myself to be able to meet all the obligations Elder Talmage lists, and to be the sort of person Elder Packer describes, and it got me through the last few years before I went to the temple last October in preparation to be married (in fact, they're still on my wall, just because they're really good quotes). And I finally did make it here, though it was so hard to wait--and it's so worth the waiting and the preparation. :)