Hi! We just closed on our first home in October...hmm some tips...
Make sure your realtor is working for you not against you, and make sure that you do NOT use the same realtor that the seller is using (sounds stupid, but we almost did it)
Don't be afraid to low ball an offer- you just never know
Make sure you get a 30-year fixed rate mortgage that has you paying toward the PRINCIPLE as well as the interest. You do not want an interest-only loan. Shop around. We had a woman at weichert tell us that we would not be able to get any good loan, and that no other person would be able to do better...and then we found someone who got us a GREAT loan.
Realize that if you get a fixer-upper, it will cost you A LOT more money than you think, and it will take a LOT more time than you think to fix it.
Ther are tons of hidden costs associated with buying a home.
Be prepared to possibly have to come up with more money than you expect at closing (in our case it was $2000 more

: )
If you are buying a home, make sure to ask lots of questions about lead-based paint if the home was built before 1978, and see if you can get the seller to remediate any LBP before you move in. LBP is a nightmare (I am dealing with it now)
Buying a home as-is CAN be a good option to save on money, but be prepared to deal with it being a big risk.
Don't pay more than $500 for homeowners insurance. You should NEVER pay more than this.
Make sure you include a termite inspection in your home inspection.
Get two carbon monoxide detectors- one for the basement and one for the hallway by your bedroom if you have a furnace b/c they can give off CM.
*Note: replacement windows cost a LOT- like $200 a piece.
If you want to build on to the home- make sure you check out permits in your town before you buy the home
Don't get too attached to a house until closing!
HTH!!!