Drawing perspective is considered one of the hardest things in art, except the mistakes usually done are pretty much always the same and can be avoided with a little care.
1. Lines not reaching the vanishing point
Well this is pretty simple to avoid but it’s the most common mistake. It’s probably due to either carelessness or really not having understood the basic of perspective. I encourage you to go back and find some basic tutorial for this.
Anyway, be ALWAYS careful about where to ‘send’ your lines, they NEED to go towards the correct vanishing point or it will just look awkward. Double check if necessary.
And always, ALWAYS use a ruler.
If your style requires lines that are a bit less geometrical (as mine do, I have a style of inking that’s sketchy so ‘perfect’ lines drawn with a ruler usually don’t fit well in the picture) use a ruler anyway for the pencils and then ink later by freehand. At least you’ll have correct guidelines underneath.
For traditional drawing be sure you have a ruler and be sure to use it for each one of your lines.
Modern drawing software will help you a lot with this if you draw directly on computer: painting software such as Clip Studio Paint or Manga Studio 4EX or 5 have perspective tools that will automatically snap your lines towards the vanishing point.
it’s quite a long tutorial, you’ll find the rest under the Read More or you can download the pdf file here