I watched the example solve you sent me.
I think you need to recognise the corners faster and get a little better at the colour scheme. Like thinking "this corner is green-orange, the edge pieces on this bit are blue-red, the correct place is on the opposite side", and quite fast.
Good practice to solve on the bottom before learning F2L, like you do.
Thanks for the input! That's exactly what I've got in mind. Part of the problem is that I've been using three cubes. The one in the video I just got yesterday. The color locations are a little bit different than on my Rubik's that I keep at work (which has a tendency to fall apart on my when I'm working quickly). And that one's different than my daughter's which I use at home for now. From your comments I should probably stick with just one cube for a while.
Thanks again!
Tim