WordPress Security. Daily Updates. Backups. Testing. Site Hardening. Hack Repair.
This 17-page free PDF gives a good overview of the steps you should take to protect yourself and your organization against the majority of threats (We agree with most of what they say, but disagree re: Weebly and Wix for web hosting. WordPress is better in many ways):
https://www.cs.rice.edu/~dwallach/howto-electronic-adversaries.pdf
If you have a WiFi device of any type, you should check to see if there is a firmware update available yet (or have your local computer expert/12 year old do it for you). For a list of manufacturers which are affected, and those which have issued updates, see: http://www.kb.cert.org/vuls/byvendor? searchview&Query=FIELD+Reference=22851 9&SearchOrder=4
For more info on the vulnerability, see: https://krebsonsecurity.com/2017/10/what- you-should-know-about-the-krack-wifi- security-weakness/