One thing that can ruin an outfit is a missing button. Fortunately, it is quite easy to sew on a button. It just takes a little practice. Here is a short video showing how to sew on a button. This is a skill that every fashionable entrepreneur should know how to do as it is quick and can save quite a bit of money.
To make it a little easier and to ensure you have all the supplies you need for minor fashion fixes and hems, pick up a small sewing kit that you can take with you in your bag.