In adjusting your fit, the first thing you need to get down is your saddle position relative to pedal position (basically knee-over-spindle) and leg extension. Do a search on the forums for more info on this, as that is a very cursory explanation. If this is set up wrong you run a decent chance of developing knee issues. Do not try to adjust reach issues from saddle to handlebars by moving the seat around.

You can shorten your reach (1-2 effective cm) by flipping your stem up (so that it is angled up rather than more or less parallel to the ground), or by putting a spacer under the headset if your have room on the steerer tube. Doing more of an alteration tends to mean replacing your headset, which is relatively cheap and painless.

As a previous poster said, pictures would help.