When defining good science, one thing to keep in mind is that there are two basic sorts of science; operational science and origins science. Operational science is the sort of science that is testable and repeatable and verifiable through experimentation. Origins science is basically history, and cannot be proved or disproved though experimentation or observation. Operational science is the type of science that is responsible for the great strides that have been made in technology; through experimentation, scientists are able to learn about the world around us, and can make reliable predictions about patterns which they see in nature; whether it be biology or chemistry or geology.
This page is currently under construction, but here is a series of questions to ask when confronted by something which is presented as science:
Can it be tested? Can it be observed? Can it be verified?
If none of these apply, then it is not operational science, and a new question must be asked: