Consider documenting your daily reflections onto a journal or diary. Keeping your diaries digital cuts down on paper clutter and enables you to write while you're on the move - like when you commute back home from work, for instance.
Taking a photo that accompanies your piece of writing can capture your reflections and experiences in an interesting way. It helps you look back on your writings and relive your memories.
Here are some areas you might wish to write about:
Describing a moment spent with a friend you met
Reflecting upon a news article you read and sharing your views on it
Something you saw on social media and sharing your opinion on it
An interesting conversation you had with someone
A gift you were given that you liked
A special occasion celebrated such as a birthday, an anniversary etc
If you haven't considered starting a journal
Some writings revolve around my reflections during my walks . Sometimes I would reflect upon the news I had watched in the morning or an article or a blog I had read on social media. At other times, I would reflect upon a conversation I had with a friend and the views that we shared. I would then document some of these reflections in writing through a journal.