It used to be that you could safely click on links and files from your family, friends and colleagues. This is no longer true. Hackers now impersonate loved ones and try to entice you to click on malicious links or attachments. Scammers often hack into personal email accounts to send malicious attachments to their contacts.
Think before you click - every time. Hover your mouse over links and check that the link that appears is a reliable one.
Be cautious. Check before you open a file. Is the file really an application? An easy way to tell if an attachment is safe is by checking the file extension. The safe ones are GIF, JPG or JPEG, TIF or TIFF, MPG or MPEG, MP3 and WAV. Unsafe attachments can be .bat, exe, .vbs, .js to name a few. Consider using a preview pane before opening an attachment. Microsoft users can use attachment previewers with Outlook, Word, PowerPoint, Excel, Visio, images, and text files. Scan attachments with an anti-virus. BE SAFE!