I'm very undisciplined and easily distracted. Unless I have deadlines from others (like going to an office, having specific work to do), it's too easy use up my time doing things I like doing, but that aren't essential to what I want to do. I could easily spend two hours reading the New York Times (in print) and then another hour or more playing Luxor Maj-jongg or Bejeweled, and another hour or more reading Facebook and clicking on the links friends have posted, and another hour or more reading all my e-mail and the various links other friends have posted -- and there you have it: almost seven hours just reading stuff that's interesting (many things are interesting to me) but not focused.
So I have to learn to set priorities, my own priorities. If I'm semi-retiring to write, writing has to be the first thing I do. If it's not supporting my writing, the reading has to wait. Writing, the writing group, reading books on writing, talking about writing: those are priorities. Reading for fun counts, but not online. Reading online is an open-ended temptation, links to links to links. Print books keep you in the book.