1. identify what's making you draw so slow. can't figure out pose/anatomy? too perfectionist about inking? getting caught up in details? indecisive coloring?

2. timed gesture studies. draw a loose figure w photo reference in 10 minutes. do that a bunch of times. then 5 minutes, 3 minutes, 1 minute. train yourself to omit as much detail as possible while keeping the figure recognizable.

3. the dot/line exercise, sometimes called the "target practice" warmup. draw two dots, then a line connecting them. keep moving the dots farther apart while drawing the line as fast as you can while keeping it STRAIGHT (not wobbly!) and hitting the second dot. the line is ONE stroke. it's harder than it sounds. this should help you get an idea of how fast you can make a controlled stroke

4. look up tutorials on coloring more quickly in whatever art program you're using if you do digital art. chances are there's a tool or setting that can make it easier to fill in shapes. i almost never color by hand, i fill bucket everything

5. free yourself of "clean line art"... 9 times outta 10 people think sketchy lines are more visually appealing anyway. it's faster and they have more life. in my opinion at least

6. use lots of references. spending hours on a complicated pose from memory instead of just looking at photo/3D model reference isn't impressive it's just stupid and unnecessary

7. study with intent. if you struggle with leg anatomy for example, do lots of studies from photos (eyeballing and tracing), then try it freehand/from memory, rinse and repeat 9000 times until it's not something you get stuck on when it comes time to do an illustration/comic page

8. less detail. simplify. you can have ultra detailed art or you can draw fast. pick which is more important to you

9. bullshit it... draw ugly and bad but do it fast. done is always better than perfect

10. thumbnail. it's not just for comics. do a teeny tiny sketch of your drawing beforehand with colors. then use it as reference. helps to finish the actual piece faster when it's planned out