Through "Privacy Shortcuts" you can perform a quick test on your privacy settings by going through the "Privacy Check-up".
You can also control who can see your stuff (select "Friends" from the drop down list), who can contact you ("Friends of friends" is a preferred option over "Everyone", however, don’t accept friend requests from strangers), and you can learn how to stop someone from bothering you (this is the section where you can Block people as well).
You can also choose what is visible in your timeline. Turn on "Review posts that friends tag you in” (go to "Privacy shortcut”/"See More Settings”/"Timeline and tagging") so you can approve posts where your friends have tagged you before they appear on your timeline.
It is also recommended you opt out of search engines being able to find your profile. You can do this through "Settings”/"Privacy Settings”/ "Who can look me up?” then click edit and un-tick the box.