I wouldn't recommend buying stuff. Remember you do get given a lot of things and it's worth waiting to see what you really need to buy - there is a lot of wastage when it comes to baby things that you never really use. I would also be aware of what others here have said re: painfulness of looking at a lot of baby gear if you are having trouble conceiving or (as in my case) have miscarriages or a stillborn.

That said we had a pair of bootees given to us which were sort of like our "good luck charm" through our early pregnancy. I had them on my bedside table throughout the pregnancy. I also bought one little suit when I was in early pregnancy as a kind of affirmation that this little one would be with us soon.