1. Speak to a Mortgage Specialist. This is invaluable and proves to sellers that you are serious and have done your homework.
2. Take a thorough look at your Finances. Understand how much money you have available for a down payment and how much you have accessible in liquid cash for your deposit (which is required within 24hrs of an accepted agreement).
3. Do your homework on where you want to live. Explore the city and neighborhoods, know what is important to you (natural light, transit access) and go from there.