Guys, in your experience - what do you feel deserves your effort the most for improving your google ranking postition in the serps?
1. A link to your site on your facebook page, which is then "liked" by your friends.
2. A tweet which contains your full link (not a URL shortener) which is then re-tweeted by your followers.
Please dont say this doesnt affect serp position - because I know it does - but just not which of the above two is strongest.