(2) Get one main, maybe plus a few extra, good books
on the topic.
(3) In a good chair in a quiet room, in the good book,
read the material on the topic and try to understand
it well enough to make sense. Then work the exercises.
If something doesn't make sense, look in
one or more of the other books.
(4) At times, review the last several topics and
try to get more understanding, e.g., what else is
true, what is not true, what makes the true
statements true and the false statements false.
Maybe take a class that covers the main book
and check work and understanding with the
professor.
(1) Pick a topic at about the right level.
(2) Get one main, maybe plus a few extra, good books on the topic.
(3) In a good chair in a quiet room, in the good book, read the material on the topic and try to understand it well enough to make sense. Then work the exercises.
If something doesn't make sense, look in one or more of the other books.
(4) At times, review the last several topics and try to get more understanding, e.g., what else is true, what is not true, what makes the true statements true and the false statements false.
Maybe take a class that covers the main book and check work and understanding with the professor.
Rinse, repeat with other topics.
Done.
Worked for me.