Today, pay attention to the things that trigger your thoughts of the past. It may seem like you think of bygone days more around the holidays, but actually we think of the past everyday.
For the past two years my daughter, her husband and two children lived with us. Now, they've moved to another state and I'm experiencing a second round of empty nest.
As I soaked in the tub last night, I noticed the worn polish on my toes now half grown out. It triggered thoughts of my six year old granddaughter and the fun she had painting my nails.
Keep an index card handy today, jot down triggers to the past, and write a scene using one of them. Links in logic connecting to the past make your writing emotionally realistic.