Here are some examples of loose expressive pen sketches. I spend just under 20 minutes a day to sketch. Observing my subjects directly is my favourite way to sketch, as I enjoy the deep understanding I get from observing it in person.

 

Blind contour and semi blind sketching are my favourite ways to sketch while relaxing. I like moving my hand across paper, while mindfully observing an object I love.

Simplifying into simpler shapes: Fruit and urban scene study.

Observing negative space and angle of the lines: Study of a pigeon and an urban scene.

 

Quality of the lines: Using light and heavy lines. This was a great practice that helped me observe the darker and lighter areas on my reference.

Adding rendering techniques to complete my sketches.