What not to do as an Investor !

I was in my Corporate Finance Class today when my instructor said something, I could relate a lot to. He said that we should not look up "7 Sectors You want to Invest in" or watch those shows in which suited individuals debate over which security has the maximum "upside" or which ones to sell as the target price has been lowered by a popular investment research firm. I felt he actually made a lot of sense.

Such shares are already bought by HNIs(High Net Individuals) and it is the task of these media outlets to popularise purchase of equities in the secondary markets. So I actually believe that there is no point browsing such websites or listening to such news and better to do our own research.

Don't you guys agree?