Yesterday I spoke about Strict Press for Handstand Push Ups.
The thing is that being strict in every movement you do will improve your stability which is the foundation for your strength.
If you have spaghetti noodles for your spine and trunk muscles, then you will not be able to move your limbs safely and powerfully.
Get as strict as possible in your movements, especially when the focus is on strength. Believe me, the results will come!
Film yourself or get a coach or friend to watch you and make sure they absolutely call "no-rep" on ones that you don't quite have good technique.
Good luck out there and get strong!