Once you have passed your test most people will assume they are a good driver and although their skills will increase with the extra practice and experience it does not follow you will be a good safe driver. It is quite common to start to pick up little habits that may not be best practice for safe driving.
You can go on to improve your skills and improve your own safety by taking further training to gain advanced qualifications. The benefits will include lower insurance premiums and a reduced risk of having an accident not to mention fuel efficiency.
With a little research you can find courses to improve your driving and get the benefits above. One such company is the Institute of Advanced Motorist. Follow the link or copy and paste to your browser.