In Factiva, scroll over the "Search" tab and choose Search Builder. In the "Source" box, type "new york times" and search. Click on the link that says The New York Times - it will highlight in yellow when it's been properly selected. Enter keywords of interest in the "Free Text Search" box, then click on "Search".
You can also find today's NYT articles: go to "Home" on the top menu and select "Newsstand" tab, and NYT is in the second page.
Look at The New York Times.