Save the forests! These remarks are for help in reading the Investigation. Therefore they are intended not for printing, but for reading them on the screen and thinking it over...
Here you find a very schematic division of the Investigation for help in reading. See a more detailed guide (in .rtf)(in .pdf) given for teaching purposes; but also see
other detailed divisions of paragraphs which you find in most of the exegetical commentaries. See Literature on Wittgenstein.
1. names, sentences, and language games 1-64
meaning as use
criticism to logical atomism 2. predicates, sentences and rules 64-137
family resemblance predicates
philosophy as grammar
II - UNDERSTANDING AND RULE FOLLOWING
3. understending symbols and sequences-138-188
understanding: grammar and psychology
understanding a sequence given by a law
(for and against intuitionism) 4. interpreting and following a rule 189-242
rules and intentions
rule following is a social practice
III - MIND AND LANGUAGE 243-430
5. language and sensations 243-430
Criticism to private langugae
Attributing sensations (Colors, Pain)
Thinking
Consciousness 6. psychological verbs; intentions 431-693
Desire and expectations
Belief and reason
Intentional states
SOME INTERNET RESOURCES
There are endless links to Wittgenstein's philosophy on the web, and it is very difficult to sort our some good or not-so-bad ones. Look on the web, but just be always very careful: you may find any sort of absurd and misleading pages on Wittgenstein.
Many links and information (mainly biographical) are given at L.W. page .
You may find a basic presentation of Wittgenstein's ideas in Internet Encyclopedia of Philosophy. See expecially the paragraph "conception of philosophy". an "meaning".