Maintain your perspective and your cool! You may find an acceptable house on the first day or the tenth.
Determine the desired location (schools, work, public transportation, etc.) Familiarize yourself with the Budget Your Mortgage process. Use all resources available in looking for homes: Friends, relatives, advertisements etc.
Don't just buy a home for your present needs. Make sure to take into account future considerations. Get familiar with the inspection process, especially the personal inspection aspect, so that you can weed out unacceptable houses quickly.