when your animating you tend to feel rushed after a little, when this happens take a small break! play a game or watch some videos! When you're in the mood for animating try to challenge yourself and make something really nice! If you don't like how your animation came out, next time constantly double-check before posting. And if there is anything your unhappy with have patience and fix it! it's difficult to animate sometimes, but like before, take some breaks. watch some interesting animations on youtube, it helps inspire me ^^ use fast pace animation lengths and use each frame wisely, it makes it look clean! if you're lost in how many lines there are, take it apart layer by layer, it helps to just watch your animation sometimes to check if it looks alright ^^ hope this helps! ^^