1.A Learn some computer programming skills and languages. You don't have to have a vast knowledge, but even looking up some free tutorials and beginner guides can really help you understand how the hacker is getting information.
1.B. Find or buy programs to help. There are several programs that can track someone's IP address, mask your own IP address, and even add an extra level of protection to your computer.
Hire someone. There are many individuals who are already very experienced in protection software, anti-hack programs, and computer programming who can catch the criminal.