When I was first starting out in real estate, one question I loved to ask other SUCCESSFUL people is "What was your biggest mistake?" In the world of investors common answers were, I didn't buy enough houses, or, I didn't use my money wisely, or I misjudged repairs, or I sold too many houses and wished I would have held onto them, and the most common was, "I wish I would have started in real estate sooner". Amen to that. I like that question as I like to learn as much as possible, as fast as possible and I still aim to learn something new every single day. Not too long ago, someone turned the tables on me, and asked me that question. I had to think about that long and hard but my answer was that I was not flexible enough when I was starting out. As I was focusing on rental properties, if they hit my numbers, I would buy, and if it didn't, I would pass and move onto the next possible deal. I was aggressive with buying so I cannot regret not buying more, BUT, I left a lot of money on the table on deals I did not buy, but other investors did buy, that I could have profited from. Back then I had no idea the concept of wholesaling real estate, which is getting a property under an assignable contract and sellnig your rights to the contract. I estimate, by the rate and number at which I looked at houses, that I probably left between 75 and 100,000 on the table! It is not always does the deal make sense to you, but, is there a way to make money on it? You have to be a swiss army knife when looking at opportunities (real estate or not) to determine if there is money to be made! So, you succesful people out there, what was your biggest mistake?