Yes, Do It Yourself Degree. The book is slightly out-of-date, but not terribly. It walks you through the process of getting enough credits college credits in the right subjects almost without taking any classes. There are exceptions to this rule. Basically, you end up taking 1–3 classes at and "caching out" your college credits to graduate quite rapidly.
The trick, in a nutshell, is to leverage "degree completion" oriented institutions such as Thomas Edison State University, Charter Oak College, and Excelsior College. They all wave residency (for a price) and have very few limits on the number of ACE / NCCRS college credits you can import from third party sources.
Consequently, it's possible to accumulate steeply discounted undergraduate credits very rapidly third party websites like Straighterline and Study.com at a steep discount. It's worth mentioning that Saylor.org is all but free — you have to pay for the proctor's time, that's it. All of these institutions support credit by exam as well. CLEP and DSST are the two most common ways to do that, but TECEP and UExcel are also doable — but harder to find study material on. The site Modern States has a ton of free CLEP study material, too. There are official study guides for CLEP and DSST, too.
Some degree paths are easier to pull of this way, with a bachelors in business and bachelors in psychology being the two most common.
As for study-skills related resources:
For time management, few things hold a candle to the Pomodoro Method. This technique is your friend, especially if you happen to have ADHD. You work in ~25m chunks of time with short breaks between each chunk to clear your head.
To study more efficiently, you need to be aware of the Forgetting Curve and how to leverage it to learn more quickly. Spaced repetition apps like Anki (free and open source) are a lifesaver. Yes, there is a "cram" mode if you really need it, but that defeats the point of using spaced repletion.
For better book learning, get your hands on How to Read a Book: The Classic Guide to Intelligent Reading. This is not for reading textbooks efficiently, this is for learning to digest inevitable reading assignments — some of which can be stuffy and dense — without loosing your mind. The Fallacy Detective will help you develop higher reasoning skills that can help you pick apart arguments more effectively than an untrained person. This an extremely useful skill not just in academia but in real life.
Lastly, there are some extreme mnemonic techniques documented at the Art of Memory Wiki which can enable you to bulk memorize even faster — for some kinds of information anyway — than would otherwise be possible due to the effects of the forgetting curve. Some of these techniques take a few weeks of effort to master but are beyond worth it. The most famous of these is the Memory Palace technique. Once you master that, and get used to creating memory palaces on the fly, you'll be able to bulk memorize far faster than with spaced repetition alone. It's more than worth few weeks of effort it will take for you get comfortable with the technique.