It is undisputed that golf grip makes for a great game. Why? Because it is the way by which your body gets connected with the club. So if you want to have good results, better practice your grip. Here are some tips that can help you out:
For holding the club, make sure that you do it firmly. Do not hold it too tight.
Just relax. Treat the club as an extension to your body.
The pinky of your lower hand should overlap with the upper. For a steadier feel, you can also interlock them (similar to pinky promise).
Always practice a grip then choose one that fits to your game.