My 2 cents:
1) Check out what the people are thinking, are they hungry, thirsty, need to go to the bathroom? Build more stalls as needed.
2) Make sure you have enough handymen to clean up the footpaths and empty the trash bins. (uncheck the boxes for lawn mowing and plant watering on all or most of them). Footpath many to troubled area's of puke, and litter.
3) Review the vanadlism in your park. Fix park benches and garbage cans which have been vanadlized (by replacing them).
4) Keep the up the interest in the rides by dropping the prices on rides where ridership has fallen off.
5) I like to make some of the gentle rides free after the first season or so, this way guest who have spent all of their cash can still hang around and ride something which keeps them happy and should help your park rating.
6) Review the inspection interval on all rides, I usually set them all to 10 minutes from 30 minutes, and hire enough maint. people to keep up.
7) Make sure some of your queue lines are not too long. I think you could make a log ride's queue line 2 miles long and if you park had enough peeps you could fill it. Problem is that the peeps start complaining that they have been in line forever. Reduce the queue length or jack the price of the ride up (Your economics professor would smile)
8) Make sure people are not getting lost. If a peep wants to "go home" pick him up and get him out of the park.
Well perhaps that was a little more than 2 cents.
On ride photos are available on certain coasters, but only when you design your own. You add it just like any other vaild track section.