Forums like ENWorld or The Miniatures Page. I regularly use the Internet as a vast resource of news in general. In particular I follow (currently) over 50 Blog's using Google Reader and dip into this excellent pool of information several times a day. But I also enjoy that most endangered of species, the Magazine.
In recent years several magazines have stooped producing paper versions of their publication and either stopped entirely or made the move to PDF versions. The most famous example has to be Wizard of the Coasts decision a couple of years ago not to renue their licencing agreement with Piazo and to stop making paper versions of Dragon and its sister publication Dungeon. I used to buy both magazines on a regular basis when they were made from paper rather than pixels but I must admit they have lost their appeal for me completely now thay are pdf only. Part of the problem is I am not terribly interested in subscribing to WoTC's D&D Insider suite of tools which now includes the magazine content. However that is not the only down side for me, and others like me.There seems to have been a concerted effort over the years to make readers feel like they are old fashioned or behind the times if they don't convert seamlessly to electronic format. I'm certainly not a Luddite when it comes to technology. I enjoy new tech and new modes of communication immensely. Aside from this blog I have an active facebook page and I participate in several dozen online forums. But I have to say that the electronic magazine is a step too far for me.
Part of the attraction of a paper magazine is that I can read it anywhere I like. In bed; On the bus: At my desk; Over lunch: In the bath and a dozen other places where a laptop or notebook just wouldn't be appropriate. I certainly haven't got the spare cash to pay out for a Kindle or other reader device. And I spend all day looking at a screen as it is without filling my spare time reading magazines on one as well.
On the plus side some pdf magazines, like Dragon and Dungeon are now in landscape format so they read better on a screen. And there has been a huge increase in the use of pdf sales to distribute smaller independent games. I've purchased lost of material this way, from Dungeon floorplans through to scenarios and sourcebooks.