This may not be for everyone, and I don't know how it will be received, but you can try this. Thanks to Dizzlekush for the stepping stones. Seems to help quite a bit with the lanky og's etc. We'll see how this looks as it finishes flowering. Right now they're just finishing their stretch. I am still playing with timing and application.
6-BAP. Synthetic cytokinin.
6-BAP on the left, control on the right. I chose these plants because they were identical in size when I flowered them. You can see the treated plant stretched less. These plants were set off to the side and aren't receiving direct light, so even better results are possible.