The following links have a range of useful links to help you to develop your sketching techniques (These are not exhaustive and there are loads of great links on YouTube !
Top Tips to Improve Sketching | https://youtu.be/0GYRJlreYtA |
Drawing in perspective | https://youtu.be/yD7gnZu8M6s |
Sketching Exercises | https://www.youtube.com/watch?v=IM_zvACz2og |
Speed Form Sketching with Markers | https://youtu.be/KLTqrnOpDyk |
Industrial Design Sketching Tips | https://youtu.be/XYaRyxs7e3w |
How to Draw a Modern Chair | https://youtu.be/q1I8njsxYW8 |
How to Draw Rounded Corners | https://youtu.be/6ZU-ryDOtLw |
Basic Sketching - Ellipses | https://youtu.be/la2UP34SHm4 |
Basic Practise to Improve Drawing Skills | https://youtu.be/8fGckJEx0aQ |