Very easily you can remove the buttons from a boring cardigan and add on some cool buttons and it really spruces up your outfit. Start out by removing cool looking buttons from any item of clothing before you throw it away. Save them in a little box for later. Another cool trick is by using a contrasting bright colored string to sew on the button. For example, take a white cardigan and sew on light green buttons, and use hot pink string. It will give your boring white cardigan a fresh summery look.