Keep your purpose in mind when you read:
Questions can be
Here are some sample questions aimed at eliciting a criticism of experimental methodology:
When results are conflicting, you might find it useful to ask the following questions:
There are a number of effective methods of note-taking:
Most material on the Internet is not peer reviewed (unlike many journal articles and most scholarly books). You therefore need to read these writings critically and objectively.
For further assistance, read the 'Evaluating web pages' section of the Beginning Research LibGuide.