Keep a journal on what happened that day. I did one for my running, een though I ran the same route, there was always something different.
Start a blog, it dosent have to be a writing blog, it can be cooking, travelling, fishing or whatever your interest is. It will motivate you to write.
Write about your experience, the day you went to Aruba, sky diving, first time you ate crickets or life in university. Everyone has a moment in their life, share yours.
Motivate yourself to write a short story, or challenge yourself to write a novel. You don't have to spend your whoe day writing. An hour is good to start. Use writing prompts to get you started if you are stuck.
Here are four writing quotes to get you started.
Quotes for Writinng
Fill your paper with the breathings of your heart.
Writing is the painting of the voice
To me, the greatest pleasure of writing is not what it's about, but the inner music that words make.
Writing is an exploration. You start from nothing and learn as you go.
E. L. Doctorow