You are on the right track with superimposed lines, though for the ghosted lines I'd recommend doing more lines when you start doing that exercise as part of your warm-ups. Ghosted planes look good as well and I'd recommend grouping them up closer together once your get comfortable with ghosting your lines.

Tables of ellipses looks good, I'd say try to ghost your ellipses more.Try going through the motion a couple more times to really see if your ellipse is going to touch the limits imposed by your other ellipses and the table you've drawn out. Immediately visible in the funnels exercise you're not varying the minor axis of the ellipses. Have another look at the ellipses chapter of lesson 1. Uncomfortable mentions that as the ellipse moves to the side the degree changes and this widens the ellipse.

Plotted perspective is good, line weight and the cross-hatching help filter out the boxes. For rough perspective I'd recommend ghosting your line from the corners of each box to help with accuracy. Your rotated boxes show a bit of hesitancy, don't be afraid to rotate the boxes more and have the lines converge more sharply. Review the rotated boxes exercise and pay attention to how one sides of the box change. Also don't be afraid to taper the boxes, it is necessary for the exercise.

In organic perspective I've noticed you're re-drawing lines and it makes it difficult to tell which lines were drawn first and this harder for others to identify your mistakes (and it makes it harder for yourself as well!) If you make a mistake, ignore it and push through to finish the box and eventually the exercise. Again, try ghosting the lines when plotting the back corners of each box, it'll help with making the box feel more natural. I'd also suggest varying the length/width of each box, they don't need to be perfectly equilateral (all sides the same length).

I'd recommend revising funnels, rough perspective and rotated boxes. The last two will definitely help when you get to the 250 box challenge.

Oh, and don't forget your warm-ups!