Often with me i draw from Фильмы sometimes and it helps me think a bit and helps me work through challenges. Ты could also give a comic strip a try. Like the person before me сказал(-а) take a scene или chapter from a book или your own mind and draw a little comic strip for it.
From my view of your drawings I've got a little constructive criticism for you. Ты lack dimensions. That is something Ты could work on trying to make drawings with perspective and add shadows. A good exercise to work on it is exploding box effect. At this link Ты can see a pretty good example of it.
link Another thing Ты could do i learned this from my art student teacher. Ты put dots down in a pattern with curves like Ты can make a cursive L или C etc. или something Ты designed yourself as many dots as Ты want my first one was about 200 something anyways. Your total number has to be a multiple of three. When Ты divide your number by three it should come out without a decimal. Once Ты have the number Ты go to the dot number that it is and start drawing lines from there each dot should have a dot corresponding to it. Ты draw a line from that dot number to number 1 and then Ты go to the Далее one and draw it to two and so on. I believe it was called a helix when it was explained. It should look like a cool spiral type thing when its finished