What materials do you use? Describe your technique:

Pretty much all my drawings here are done with a ballpoint pen on location. I don't use pencil first since I find that a ballpoint can make a light enough line without committing too much ink right away. I do however rip out a LOT of pages from my sketchbook. My technique is pretty unforgivable if something is majorly wrong. Often, I will return for more than one sitting or draw 'just enough' to finish it at home (like shading).

If I colour a sketch, I use Photoshop and a graphics tablet. I paint 'behind it' with the black lines on top since to me the sketch is still king and I like the comic book style result. Usually, my drawings are detailed enough with enough information that I can remember what colour everything is. Sometimes I might come back for a second look or take a photo to help me remember the types of colours things are. In many cases, I will just guess most of the colours!