Hey!
Increasing yield begins in the first stages of life.
First of all if you want high yields it’s good to find strains that naturally yield more.
For that you’ll need optimal growing conditions, good health, good evenly spread canopy for even light penetration and equal energy distribution. You need to learn plant trading for this.
I would learn some plant training techniques that help increase yield indoor.
Low stress training is a easy way to start.
Do all the work you can in veg so that when they switch to flower they receive equal energy and those buds fatten up fast. You’ll have more bud sites, denser buds.
Another good thing to do is after the fourth week of flower add a PK booster. That increases biomass, flavor and smell in the Buds. I like to use an organic pk booster.
Hope this helped.
Good luck and happy growing!