To improve on my art I largely analyse the artists I love and try to understand the patterns in their work. Like sometimes my faces seem a bit off, or my colours seem flat, or my levels aren't so great, but by seriously analysing photographs/people/artistic renderings I learn to recognise where I'm coming up short and make an effort to change. I also keep a pile of inspirational material by my laptop and flick through it every now and then when my panels seem mundane or repetitive. It'seasy to fall into the habit of using the same headshots or angles in a long form comic but simply being aware of that is half the problem already dealt with. I know I have a lot of weaknesses and limitations but I'm so thrilled with how far I've come since I began this whole thing that I know those problems are small potatoes. One day they won't be limitations any more, just got to keep practising.
For writing I try to read, though not to too much because I know I'm very suseptible to embodying the latest thing I've played/read/watched and injecting it into the comic by accident. I've avoided playing the Witcher and watching certain films for this reason. I know I'd be waaay too into them.
I do improv writing where I can, roleplaying where I can, and generally do a lot of research day to day. I use dice to mix things up as well. It can be fun to throw a Hail Mary plot changer and see how things play out from there.
Dialogue is improved by playing it in loops in my head for days on end-- not sure I'm actively doing that though! It's quite passive. I just edit things as need be. Active listening is a huge thing for me too. Like actually playing close attention to the way people talk to each other. You can learn a lot about personalities and attitudes just by observing them in action. Work is a great place to do this. Try looking at your colleagues like characters and defining their quirks.
That's all I got, though. I know there's a lot more I can do but there just isn't enough time!
