I love going on Pinterest and other places like Behance to find some inspiration. I looked up 26 days of type projects of other designers for more detailed inspiration. You can get a lot of different styles.
Did some basic sketches in my molsekine with a 2b pencil, after doing thumbnails I did these refined versions.
Vectorized the sketches in illustrator added color, texture and highlights to give it life. I used a mixture of techniques from brushes, flat shading and line work for variety. (if you want to learn to texture you can check out my ultimate texture technuiques).
I went and used the same letter and created more typographic look.