Also, be sure your lender routinely closes your type of loan in 30 days. If you're buying with an FHA or VA loan, many lenders can, and a bank will wait two weeks for more money in many cases. More tips: Submit your funds verification with your offer so the bank has no question that you have the money to close (ALL the bank wants is to close the deal). Submit your FICO score from your credit report (white out your SSN). Submit your FULL-DOC pre-approval from the lender you're going to use along with the seller's required lender if they have one. If there are any issues at all regarding the condition of the property that may be a problem with your loan, address it in the offer so the seller/bank knows you have a plan and will be able to close.
Now, get in there, and write your offer!