The Psychology of Achievement, by Brian Tracy, does have some good advice and information in it. Specifically, how to talk to yourself and goal setting. He does say things like you should tell yourself that you like yourself but literally repeating "I like myself" over and over. While that is a bit hokey, the discussion about figuring out your goals, and then cementing those goals by saying things like "I make [insert income per year]" or "I weigh [insert goal weight]" and writing down your goals on a daily basis are sound and helpful. Some of the law of attraction stuff is, as it has always been, kind of dumb, but he does go beyond just advising you pretend that you are something, but visualizing it and then taking concrete steps to make it happen. He also advises things like meditating (what he calls going into solitude) for 30-60 minutes, listening to "tapes" on a daily basis, whether self-help, something you want to learn, topical seminars, etc. Basically, that translates to these days listening to TED talks or informational podcasts. He also gives advice on how to brainstorm effectively and gives a lot of tips on becoming more creative.
All in all, it amounts to good advice to making yourself more productive and successful. The advice is generally practical (like do not set a goal that is unreasonable or incongruent with your current situation) and helpful. It will not turn you into a success overnight but will give you the skills, that if you implement them, help you become more successful.
