TIP 1 –  Beware of TMI:  the five things you should never share

TIP 2 – Customize privacy options

TIP 3 – Limit work history details on LinkedIn

TIP 4 - Don't trust, just verify

TIP 5 – Control comments

TIP 6 – Avoid accidentally sharing personal details

TIP 7 – Search yourself
 

full list via networkworld