For your timing questions, read this article:
http://www.manhattangmat.com/blog/index ... anagement/The article goes beyond what you asked, but read the whole thing and start doing what it says. :)
Use Archer whenever you want to do OG problems. Open up the program, navigate to the page for the problem you want to do, open up your book, start the timer, and go! Make sure that you're recording times and answers in Archer so that you can take advantage of the reports and statistics offered in the program.