I think a "personal fan" is a little plug-in fan (about 5 or 6 inches diameter) that comes with a spring mounting clip. It is designed to clip onto the edge of a desk (or a tank!). What you want is to blow as much air as possible over the surface of the water to cause as much evaporation as possible. The more evaporation, the more cooling. Just be sure to mark the water level in the tank, and keep topping it off with fresh water (with no salt added) to replace what evaporates.
I know you room isn't, but is your house air conditioned? If so, your best bet would be to keep your windows closed and your door open, so that the warm air in your room can mix with the air conditioned air. If not, then keep your window open, so that you can move that humid air outside (humid because of all the evaporation you are causing) and get dryer air (from outside) into your room, to keep the evaporation going. Before I got AC I had one of those fans that fits in the window and has two fans in it, one can push air out, and the other can push air in. That would expell the humid air for you. If your house has AC, then set both fans to push air out, and leave your door open so that cool AC air will be drawn up to your room to replace what gets pushed out the window.
The only two ways to slow down heat fluctuations are to increase your thermal mass (more water volume) and to insulate your tank. I have a chiller, but I also have my tank sitting on a 2" thick sheet of Styrofoam. I've also cut styrofoam sheets to cover the back and one side (I covered them with black vinyl (cheap at the fabric store) so it looks good, all held on with black duct tape. It really slows down the heat from the room getting into the cooler tank water. You can add water volume by adding the largest sump that will fit, just be sure to insulate it on all sides. Rigid styrofoam is plenty strong to support the weight of an aquarium, which works out to less than one pound per square inch (no big deal).