6. Buy in Warzones – It is wish to buy property at a deep discount. In today’s market you can find huge discounts in many areas with the glut of foreclosures. Do your due diligence. Buying a property for 20K worth 80K sounds like a slam dunk, but not if the property is vandalized multiple times during repairs, surrounded by 20 other foreclosed properties and there is next to zero interest from renters or buyers due to the location in or near a warzone. Make sure there is strong demand from renters and/or ownership in the area.
The 5 mistakes discussed before that #6 above are also well worth reading: I Want to Learn RE / Blog.