im not sure i have a system, but there's certain things i like and i've learned over the last 5 or so years that i've been drawing more regularly. i like to work quickly and i think the best things i do, i've done quick. so i tend not to spend too long on things, if i do, they tend to feel overworked. a large part of me getting back into drawing was just doing it, without thinking so much. also i try to react to things aroundme, i suppose you could call that my system maybe, like i just spilt some ribena on the kitchen table top and the pattern looked nice so i drew it. and i catch the odd bit of things people are saying or that are in a film or a song and throw them in as dialogue. years ago, i did sketches of people in the pub and at gigs and gave them dialogue, but i've stopped doing observational stuff so much now, especially of people. i dunno, it suddenly feels too invasive, i've no idea why.