It's day three of my drawing marathon and I find myself losing motivation as soon as I make one mistake.
I can drag myself through it just fine but most of the fun of drawing is lost at that point and I feel I've kinda bricked my progress to a halt at that point.
Anyone of you know of neat tricks to regaining motivation, aswell as handy drawing guides? I'm already following one on Youtube which is helpful to refresh my memory on most of the techniques I learned in the past, but I'd love to see if there's a consistent guide that's reportedly helped a lot of people in the same situation.
Okay, I know that's kind of a silly response, but hear me out. I...have actually done this.
I'm not sure what materials you're using for your drawing marathon (Digital? Pencil? Ink? Something else?) but I know all too well that some forms of media are more forgiving than others. Pencil can be erased or drawn over, digital has that handy ctrl+z, and ink...well, yeah, sometimes you just have to incorporate that unintentional line and make it look intentional, because there's no getting rid of it.
Anyway, a few years ago when I was first getting back into watercolors (which are
not at all forgiving, once you start moving into the darker or more staining colors) I was playing around and painted a tiny little face with some really interesting leafy hair around it.
Spoiler: Here is a picture of it (face redacted for being too wonky) • show I liked the hair. I
hated the face, which was too small and too crudely painted for me to finesse into something that would be worthy of the hair. Plus, it was in an awkward place on the paper, and I just couldn't figure out what to do with it. So I left it sitting on the floor (do not do this, watercolor paper deserves better) and a few weeks later I happened to glance at it upside-down and realized: I could keep the hair, and turn the face into something else:
Spoiler: guess what I turned the face into? • show 
That's right, I literally turned that mistake of a face into a
BIRD. Which led to one of my favorite watercolors I've ever done:
So...I don't know if this helps, but I encourage you not to let your mistakes mean too much. Especially if what you're doing is trying to draw to get better at drawing, because even if you make a mistake you are still improving your skills. And sometimes, mistakes can actually turn your drawing into something better than it was going to be originally, or it can give you an idea for a future drawing. If nothing else, mistakes can teach us what we'd like to avoid doing next time.
Oh, also...I may be able to dig up some art tutorials, but it depends on what media you're working in and what kinds of things you're trying to draw? Drawing from life or from photo references is also really helpful, as others have suggested.
