FIVE key considerations to help with protecting your data, your network, your identity and your money. 

1. Don't be an administrator on your own PC for normal day to day work. Create a separate admin account and just be a normal "user" unless required. 
2. Don't run outdated software; Old versions of Windows, Java, adobe other apps 
3. Have a good quality antivirus installed, working with a current subscription 
4. Don't visit undesirable or illegal sites (or if you must; learn enough to mitigate the risk, run in a sandbox, another user account, a Virtual PC, or another PC setup for this task) 
5. Social engineering - Be vigilant when opening links or emails, unsolicited mail or other peoples USB drives 
6. (Bonus) Get a good antispam/antivirus system that blocks you from as many threats as possible before they enter your network or PC. 
7. (Bonus) Use complex passwords that are unique for your internet services