When you are negotiating main points, find out what other employers have offered. Your employer may well respond if you can show your package is below industry norms. Once that is settled, look at smaller items. Many employers make an annual payment to insurers, and it can cost them nothing to keep your name on the list. Many give this benefit, which seems to be useful and popular.
Some employers also give inducements for going quickly.
Negotiate over the company car and the laptop. They may also throw in the mobile phone. Other employees are less likely to want to use someone else's. Don't forget your reference. Agree a form of words - and put it in writing.