I had earned 717 points on my foursquare account.  There are many things I did to earn the high points:

1.      I only added Prof. Johnson as my friend so I will earn more points by visiting some place which I think Prof. Johnson probably did not visited or check-in in his account.  It would offer extra 2 points for the trip if he had never check-in the place.

2.      I tried to find some popular stores or building showed in the list of nearby, which would offer extra 4 points for the trip.

3.      I tried to go to as many different places as I can.  It would offer extra 3 points for the trip.

4.      I tried to become the Mayor for the place I visited, which would offer extra 2 points for the trip.

5.      I tried to avoid to check-in the same place I visited before.  I could earn only 1 point for the second trip to the same place if I am not the Mayor.

6.      I think the total check-ins which earn points are about 30-35 times within 24 hours.  Any checkins more than that or within short period will be resulted in 0 points