I too have a large list of companies and of course many of them I have NEVER found a job in my area. I use one Firefox bookmark for the about 30 companies that I have recently worked with. That allows all of those companies to be pulled up at once with the "Open all in tabs" feature. I try to check those 30 companies daily, especially during the first and last weeks of the month. It takes less than a half hour to go through the stack and then if I'm in a hurry I can not bother opening the tabs of those who have already posted or who I feel sure are not ready to post yet. I agree it would take hours to go through every company I am signed up with and most of that time would be just wasted because they never have had and are likely to never have clients in my area. While I also will look at emails, the global emails most frequently are for work that nobody took--often for a good reason.