Three simple ways to change it up:
1. Cuff your jeans - this adds a tiny detail of effort and you can do this with long jeans, crop, or shorts (and messy cuff can be a good thing)
2. Take out your laces - as long as it doesn't create a walking hazard, take the laces out and show off parts of your shoes that are sometimes hidden by those big knots
3. Pull your pony off center - if you're used to wearing your pony down the middle of your back, pull it slightly to one side (and the same if you usually wear it low, pull it up higher for a change, and vice versa)
All three of these things give you that effortless looking detail and encourage you to embrace messiness. Perfect for a relaxing evening or a day of errands.