Poker strategy – Learning Poker

Poker strategy

What strategy do you use, that is the most helpful in winning?
I personally, tried tight and agressive. It seems convenient and helped me win.
Since, I encountered a lot playing really aggressive, and betting an enormous amount into
the pot, trying to intimidate me, which does. (do you have any tips to overcome the intimidation of calling big bets?) and I would love to hear about your style of playing strategies and tactics.