There's no techniques to throwing just the right basics and proper execution. When you learn the basics make sure to practice it every time for it to become a natural movement.

There are some things to remember when catching from the outfield:
1. Make sure to position yourself where the ball would land first before the ball gets there to have proper catching stance as the ball drops to your glove

2. Make sure to have you momentum going forward when throwing.

http://www.softballperformance.com/softball-fielding/outfield-skills-are-often-underestimated.html

To add onto that, make sure you use your whole body when you throw. Use every ounce of energy you have.