Support, love and lots of prayer :) Also, maybe something that would help with skin-to-skin contact. Read that baby wearing does alot of good things for a preemie baby. This article has several great ideas for preemie baby gifts that might just inspire you: http://www.huffingtonpost.com/jennifer-canvasser/10-incredible-gifts-for-nicu-families_b_4920623.html
A baby carrier is a great idea. Try the ktan baby wrap