Alrite. For artists, KEEP DRAWING!!
I know sometimes we face art blocks, tough life, and other responsibilities such as school, work, and again life. It's okay to take some break, but never let go of art. Find art everywhere. Admire other ppl's work, look at the nature and how things work, and do a bit of doodle here and there. And when you find the inspiration to do art, GO. Don't hesitate, GO DRAW.
Now, I think there are two things to artmaking: Creativity & Craftmanship
Let me clarify.
Creativity: Basically the "art" side of the artmaking. This is your style. This is your own interpretation of the subject matter. This is your philosophy behind art and how things look in your idealistic perspective of the world.
Craftmanship: Basically the "making" side of the artmaking. This is your anatomy. This is the believability of your artwork (i.e. does your character look like he is stretching or his back is broken and he is a zombie). This is where color theory matters, the art education starts to factor in, and your experience shows you the faster way of drawing.
I think I saw my art improve conceptually (a.k.a. an improvement in Creativity) while I was taking a break from art. And an improvement in Craftmanship when I kept drawing for days, weeks, and months.
NOW for practical tips:
1) Draw from reference. Draw from life. Draw from a photo. This will help you improve your Craftmanship
2) Watch tutorials, and read some artbooks. Go look at artworks that you think are cool. This will help you improve your Creativity
3) Never stop midway because your drawing looks horrible. Keep going. I had a bad habit of drawing only the face, so I got really good at drawing faces. But now I'm still really bad at drawing different pose (which is what Im still working on)
4) Learn from everything. Make everything about art. Observe everything. Develop your keen sensibility.
5) Every tip, advice, tutorials are more of a guideline to give you an idea of things. However, your art is unique to yourself. Don't adhere certain tips, advice, tutorials. I.e. just because some guide tells you to draw the eyes a certain way, don't just do it that way. Study your eyes, how eyes look the way they are. Then you create your own way to interpret that.
6) Ignore everything I said, and build your own understanding of art.
Now, here are some of my art improvement to show you some credibility to my shitty advice.
This is 2010
Then 2012
Then 2014
Then I started practicing from photo:
This is 2015
Then 2016
Then 2017 where I had the worst art block (I only drew like 7 artworks the whole year :<)
And now (Ive been doing nsfw works this year, so only thing I can post is this incomplete one...):
PS: as you can see, I don't often do full-pose drawings because of my bad habit. (but there are some, I just didn't post due to other reasons) SO PLEASE keep drawing even if the part you are drawing is horrible and you don't know how to draw it.