I've just started mining, and almost instantaneously, I bought ~$350 worth of hardware for 600Mhash/s. Did I hop on too late? Will my purchase pay out? Are my fears irrational? I fear that I hopped on board as soon as everything was getting more difficult. I just need some advice!
$350 for 600MHash + electricity costs will make you a very solid profit at least for the short term and certainly enough to recoup your investment. Unless Bitcoin crashes or something.