Your car will be most secure against thieves if kept in a locked garage or secure car park. But it could be more likely to get bumped or scraped that way, so your insurer may increase your premium slightly to reflect this.
If you park your car on your driveway, consider installing a CCTV camera or motion detector lighting to deter criminals.
If your only option is to park on the street, make sure it’s in a well lit area. But be aware that if you park away from your home — even just around the corner — you must inform your insurer.