You mean for this account? If so, changing your password and email will help to prevent on future hacks. Strong password is useless if you logged on a device with keyogger malware or phishing site, just be aware of those sites.
Yes I mean this account and I am almost sure the case wasn't related to malware as none of my other accounts at any services got hacked. Anyway now I am using another machine, in fact the reason of my inactivity was a severe hardware problem and I bothered to log in here again only today. My bet is the database got at list partly compromised.