One point that Rusmin emphasized regarding long term investing was the emotions that the investor would experience. Some years your portfolio would have good performance whereas other years would not be good. He mentioned that with the easy accessibility of news nowadays, it is easy to get swayed by 'noises' that may change or affect your decision. Of course, if you have done your research on the company, holding for 10 years would usually profit.
I have been affected by price fluctuations
...