I was just wondering as the post title suggest "What has been your most valueable or rewarding lesson since you started internet marketing?".
For me it has definately been to not wait to take action.
It can be very easy to sit back and think I will do that tommorow or what I used to do was read up on lots of information and not take the next step and follow through.
Since I have made a point of taking action I have found that I have had far better results.
All the best