I'm going to be driving my S2000 from Los Angeles to Dallas in a couple days and I was checking under the hood to make sure everything was fine but noticed that the coolant level was below minimum. I was just wondering what kind of coolant I'm supposed to use or is it ok to purchase any kind of coolant and fill it up. I tried to do search but the search function doesn't seem to be working. Also, any advice pertaining to the long drive would be much appreciated. Thanks.

 

This depends on if you have a MY'00 or not. If you do, your car takes "regular" antifreeze, mixed 50/50.
If you have any other year, your car takes the Honda Type II pre-mixed coolant, which is a sort of long life fluid. You cannot get the two confused. And this stuff doesn't appear to be the same as the aftermarket long-life coolant that is orange.

As for what you should do on a long trip, this depends on whether or not you are the slightest bit mechanical. No sense taking stuff with you that you can't or don't know how to use.

Anyway, some basic stuff:
Extra oil, small funnel, rag.
Extra coolant - premixed.
Cell phone.
Owner's manual.
Can of fix-a-flat (for emergencies only).
12V air pump, tire gauge.
Flash light.

If you are mechanical:
Unidriver, channel lock pliers, socket set, allen wrenches, spare spark plug, plug wrench, box end wrenches, work gloves and coveralls, service manual, spare serpentine belt, duct tape.

 

don't forget the sore-butt massager! (that is, if your butt is bony and tends to get sore after 100 or so miles)

drive safely and watch out for those sneaky Highway Patrol while you are speeding!