Leaving things behind

I came away to France for most of August and thought I had packed everything I needed – but as always vital things got left behind, like my swimsuit and the login and password for this blog! I thought about how we both forget the things we really need – like the swimsuit, as without my daily swim in the sea I am quite miserable – and the things that perhaps we would rather not remember, like things connected with work.
I thought about how much we can learn about a character by the things they leave behind them and the way they deal with the loss.
Write about your character forgetting things – large things, small things, important things, trivial things. How does the character deal with having lost or misplaced something? Are they irritated, distressed, angry? Does it bring something up from the past – a time when something else was lost? Do they try to immediately replace the thing, or try to do without it? What are the impacts on the story of forgetting something? Small actions in fiction can have enormous consequences, both for the characters and the plotline.