a) you need inspiration to be creative. you also need passion.
b) you need to enjoy doing the process so if you want to be a writer you need to enjoy writing regardless of what it is your writing about,
c) be consistent, try to some every day even if you don't feel like it. it's okay to drop a project and start a new one...
d) you need to put yourslef out there, what ever you create let people judge it and see it and comment on it... for art work i'd instagram and fb, and art comps.
e) being creative is not restricted to art and writing. I got my creative expression in coding programs for work, then it was also in cooking... and wood work...eletrconics...kite flying/making
f) set your environment up for success... if your an artist, have a place to paint or have a place to write that is always ready for you to jump on and start doing..
g) get inspiration from other people, pinterest, join a writing club, from history
h) learn your craft, it takes 10,000hours to be an expert in something. do some writing classess to they can tell you how to structure your work, lay down the foundation
i) try different forms of the same thing, poems, short stories, journalism, writing product reviews, novellas, erotic short stories, novels, haiku, dr seuss. a daily journal, a made up daily journal, study other peoples works and do your version of that,,, ie take the plot of a favorite movie and then rewrite in a different time period and era... a lot of plots come straight out the bible in the early years of hollywood.


try as many hobbies as you can, if something doesn't appeal then try something else..maybe come up with something unique, I've changed art styles about 10 times and now I switch and change between 4 of them.