As illustrating is my day job since 11 years I have to admit that drawing in my sketchbook isn’t a regular past time any more. But I also miss the joy of drawing something just for my own pleasure.
Although you practise your drawing skills by doing a lot of drawing, finding your illustration style is something that comes from experimenting a lot in sketchbooks. Trying new styles, perspectives, colours, expressions and the likes. I’d say I have my own ‘style’ for quite a few years now, but even as a professional illustrator I feel you should never stop developing.
I carved out some time one weekend to experiment and watched a Domestika-course to get my creative juices flowing!