RAM/OOM does this for me very effectively. For example, I have opened several dozens of books right now, because when it happens to be a reading time I hate to look for any books in Downloads I am interested to read. I feel better to have opened all the books I am interested in right now. Maybe my reading session will be 5 minutes only, or maybe I want to see what I have read before leaving the reading with as little of digging in interfaces as possible.

I remember the times when 3GB computer could have 300 tabs hanging per months of everyday heavy using of the machine, but now a regular 1000$ computer can not open 300 tabs of modern webpages, so there is none of that problem any more.