A bit of Deja Vu

The market has roared forward this year and come back with a vengeance. People tell me that 'most of the retailers' are not participating in this rally. How does one invest or trade successfully in this market? Not by contra playing (high risk to your wallet) nor insider trading (high risk to your physical and mental well being) nor buying stock due to tip, but remember the 10 (well, 10-13 year cycle., take a longer term approach. Definitely don't listen to doomsdayers who last oct/nov were talking of meltdown and the end of the financial markets.