In fact it is probably better to constantly leverage one single technique than many, and maybe the single most important reason to trying your hand at many different techniques is to exactly identify the most effective one.
There is only one "technique" you need to master... STOP DISCIPLINE!
As to "what trades to take?"....look for "behavioral correlations via technical analysis". There are LOTS of correlations... some more highly correlated than others. Study the charts and remember the famous words of Yogi Berra... "You can observe a lot just by watching."