TITLE: How do I self-learn undergraduate math?
QUESTION [22 upvotes]: I am  a college student in computer programming, who has developed an intense passion for mathematics. After graduation I wish to pursue a University degree in mathematics, and perhaps a Master's degree and Ph.D.
Some posts that I read include, but are not limited to:

How to study math to really understand it and have a healthy lifestyle with free time?

How to effectively and efficiently learn mathematics

What book can "bridge" high school math and the more advanced topics?

How do you go about learning mathematics?

How can I read numbers and mathematical symbols comfortably, at a university level?

What books must every math undergraduate read?

How much proof knowledge is necessary to begin Spivak's Calculus?

Recommendations for books with solutions, to review wholly high school math?


My Question:
During the next two years I wish to learn, not rote, the required mathematics for the "undergraduate" portion and beyond if possible.
I know of some various areas of mathematics such as: Algebra (elementary, linear, multi-linear and abstract), Geometry (discrete, algebraic and differential), Calculus (single/multi-variable), Set Theory, Number Theory, Combinatorics, Graph Theory, Topology, Differential Equations, Logic, Proofs & Proof Writing, etc...
I wish to make a "road map", but how do I plot it? What books are prerequisites? I understand that various areas may cross paths.  I would like to state that I have not studied linear algebra or any form of calculus/pre-calculus yet; I am currently brushing up my "elementary" algebra.
I have come across How to become a Pure Mathematician, but ran into a snag. For instance, I had followed the very first link following the "Stage 1" heading which lead to the following book:
Barnard S. and Child J.M., Higher Algebra
After scanning some of the first pages, I realized the notation was unknown to me. After some further browsing, I realized some of the notation was found in Set Theory. This led me to infer that Set Theory may be pre-requisite to understanding this  book.
Regarding reference materials, I have seen these mentioned:

Apostal - Calculus Vol.1
Spivak M. - Calculus
G. Chartand, A.D. Polimeni and P. Zhang - Mathematical Proofs: A
Transition To Advanced Mathematics

My study regimen consists of reading the material, taking copious notes in my own words as well as the authors', asking "why", working through all posed questions, creating questions of my own, then, reviewing the material and organizing said material for input into La/Tex. During my college semesters I devote approximately four hours during the night, weekdays, and 4-6 hours on weekends. During summer periods I adjust the timing of my study periods around my work hours, though if possible, I aim for two 4 hour sessions per day when the time is available.
This may benefit the novice.

REPLY [6 votes]: You said that you are studying computer programming and then continued with: I would like to state that I have not studied linear algebra or any form of calculus/pre-calculus yet. When I was an undergraduate the entire 4-semester elementary calculus sequence, linear algebra (I think), and one semester of a standard 2-semester advanced calculus course was required for computer science majors, along with some discrete math. Perhaps this has changed.
However, I'm currently tutoring a computer engineering student, a major I would expect to be a bit further from mathematics than computer science is (he's a 2nd year undergraduate at a large public U.S. university) and, this semester (as a 2nd year student, and he is not ahead in his studies either) he's taking a basic vector calculus course and a basic logic/set-theory/combinatorics course.
That said, I think the answers and comments posted thus far overlooked your comment about not yet having studied any form of calculus or precalculus. If someone has not yet studied trigonometry (beyond basic right triangle triangle trigonometry) or conic sections (with axes parallel to the coordinate axes) or composition of functions or geometric series or polar coordinates or curve sketching of polynomials and rational functions, the advanced undergraduate level texts suggested thus far in the answers and comments would be entirely inappropriate.
Assuming that you really meant what you said, namely that you haven't yet studied any precalculus or calculus, I suggest looking at the following. I've listed these in approximate order of difficulty.
Gelfand School Outreach Program: Algebra (Gelfand/Shen), Functions and Graphs (Gelfand/Glagoleva/Shnol, The Method of Coordinates (Gelfand/Glagoleva/Kirilov), Trigonometry (Gelfand/Shen).
Modern Introductory Analysis (Mary P. Dolciani)
Getting the grip of geometry and Algebra; books and resources for a beginner [SMSG texts]
How to fill up the gap between a typical advanced undergraduate algebraic curve course and High school basic geometry/precalculus course? [Shafarevich, Selected Chapters from Algebra]