When starting out on a drawing and deciding where to start, my tip would be to focus on finding a key detail that's somewhat "safe," like the glasses on a human face, as your foundational landmark.
Glasses help me find the angle of the head box— the front of the glasses and the line going towards the ear makes a nice corner for me to base the rest of the drawing on
Once you can define some of the key planes of an object, visualizing the rest of the shapes becomes much easier.
If you can set up the foundation properly, it becomes less necessary to sketch because those first few lines are already defining the same shape information.
One tip that I have is is to observe the angle of this TURN of the box. (The blue lines)
This "y" or this corner here. It should be something you really observe and try to get right, and then think about the rest of the planes lining up to convincingly go off into space.
Also, in more complex objects, try to find this corner, somehow, to start with and align all other planes to it.
As long as you can find some sort of landmark point where the major planes of the object turn, then the other parts will easily follow.
For more complex perspective drawings, people call this an "anchor point" but for me, since I'm just drawing objects in space that might not be as dramatically foreshortened, I'm thinking about them like landmarks.
In green I explain how I would start from a landmark/anchor point at the corner of the truck, and extrapolate all the aligned lines that would go towards the vanishing points.
by Winston Tang
https://www.handprint.com/HP/WCL/perspect4.html
Even if you don't sketch perspective lines in, you should kind of visualize pieces of it on the page as soon as you draw your first 3D object/boxy shape OR even the first plane you draw.
Some people who draw like to call this an anchor point, and I refer to it as a "landmark".
Use this landmark to find the lines that go towards the vanishing points, and make sure everything else in your image is aligning to them!
Even a really complicated image to the left, all of these green and blue lines can be extrapolated from that corner I've labeled "foundational landmark"
Keep in mind I'm never really sketching these green lines, I'm just seeing them ghosted on the page, almost.
If you're ever lost, try to find another one, sometimes there are more landmarks in an image than just one corner.
Eye level is also important to check back in with.