Scraping web pages

I find the following resources useful:

1. Scraping Web Pages With R
2. Log File Analysis with R
3. How to read HTML tables with htmltab()
4. Rvest package vignettes
5. Web Scraping with R
6. rvest Introduction
7. Using rvest to Scrape an HTML Table
8. Scrape website data with the new R package rvest