Take the test in a center near where you live. The closer the location the less time you will have to spend traveling to the facility administering the test. This can also be very helpful in the case of an unforeseen complication such as a traffic jam, flat tire, or harsh weather conditions.
Take the test somewhere that promotes a peaceful environment for study and concentration. ACT testing centers range from universities and high schools to community recreational buildings. It's best to choose a quiet and secluded area not near heavy traffic, train tracks, or open to the public for anything other than administering the test during the time you will be taking it.
Take the test in a familiar location. Standardized testing requires a higher sense of preparation and focus than the typical academic exam. Taking the test in a familiar environment can alleviate potential anxiety you might have before the test, as well as allow you time to prepare for testing conditions such as the temperature of the room.
Take the ACT in a location with a visible clock. In most cases it will be difficult to find a testing center that does not provide a clock in clear sight of the testing area, but as keeping track of time is a vital part of scoring well on the test, do not leave this detail up to chance.
Choose a location, if it applies to you, that has accommodations for special needs, such as left-handed desks, facilities to take the test on a computer, or special testing for those with medically recognized learning deficiencies.