What are the most famous intraday strategies? And which do you use?

Indicator + price action trader

I am a price action trader 😁

Support and resistance break out trader!

I trade according to the trend of the market....

There are N Number of strategies in the market. I prefer use the strategy depends upon the market condition, VIX and momentum. 

I mostly sell options to receive the premium and Covered Call, Protected Put and Iron Condor strategies with a pre-defined risk management and according to my loss making capacity.

According to me, the common strategy that every successful trader follows is the proper risk-reward ratio and money management.  

Price action mainly, also as mentioned by Naresh - Proper risk reward ratio and money management.