Repurpose things that you've collected over the years. Visit flea markets, garage sales and thrift stores to find items that could reflect your style. You can always repaint, rebuild and reuse those items to make your own unique design. Be brave to express and your space will scream out your personality.
How not to be a Hoarder
If you hide or put your stuff out of sight, then you don't need them. Display everything you've got. If it's not worthy to display, get rid of it.