Make rankings of:

-Top viewed user profiles
-Top viewed photo albums
-Top viewed videos
-Top viewed groups
-Top commented videos
-Top commented groups

Combine the list above with any of the possible filters:

-Current category groups/videos
-Specific category groups/videos
-All categories (equivalent to no filter)

Additionally, optionaly filter by user options:

-Current vieweing user (actions done only by that user)
-Specific user (actions done only by that user)

And, of course, combine the two lists above selecting your desired timeframe, in the "relative time" mode:

-Last hour
-Last 6 hours
-Last 12 hours
-Last day
-Last 3 days
-Last 5 days
-Last week
-Last 2 weeks
-Last month
-Last 6 months
-Last year
-All time

Or in the "absolute time" mode:

-Today
-Yesterday
-This week
-Last week
-This month
-Last month
-This year
-Last year

Show evolution of:

-User profile views
-Group page views
-Photo album views
-Video views
-Video comments
-Group page comments

Combine the list above with any of the possible filters:

-Current profile/group/video/album being shown
-Current category to which current group/video belongs
-Specific profile/group/video/album
-Specific category
-All profile/group/video/album (equivalent to no filter)

Additionally, optionaly filter by user options:

-Current vieweing user (actions done only by that user)
-Specific user (actions done only by that user)

And, of course, combine the two lists above selecting your desired timeframe, to complete the chart's x-axis to show the items evolution:

-Last X days (define the number of days you want to consider)
-Last X months (define the number of months you want to consider)