This book is very good:
Another positive point taking critique is probably the most important thing in design and it’s one of the sure fire ways to quickly get better. I’ll gladly take a look and give a more in depth critique to that project, but to start off I would recommend learning composition, rule of thirds, hierarchy, analyze good design pieces with composition, are they using a grid system? or maybe creating depth through “layers”. Right off the top of my head I would recommend this book one of the most important design books in history imo Grid systems in graphic design: A visual communication manual for graphic designers, typographers and three dimensional designers (German and English Edition) https://www.amazon.com/dp/3721201450/ref=cm_sw_r_cp_api_i_EFjaDbWRA84GT
Basically you need look at your design in order to determine what would make most sense.
A very popular choice is to divide it into three equal sizes and then have one of them be the right or left column, while the two others combine to form the other column.
So you end up with two columns one for content and one for navigation (typical blog look)
Grids can obviously also be much more complicated as those used in photoshop, 3dmax, word or windows/osx.
If you want to get really into grids I can recommend probably the best book written about them.
Josef Muller Brockman Grid Systems
I recommend Josef Muller-Brockmann's Grid Systems in Graphic Design: http://www.amazon.com/Grid-Systems-Graphic-Design-Communicat... or Emil Ruder's Typographie: http://www.amazon.com/Typographie-Manual-Design-Emil-Ruder/d....
There are many, many other good resources but those are important primary sources. So is The Elements of Typographic Style, by Robert Bringhurst: http://www.amazon.com/gp/product/0881792128/ref=pd_lpo_sbs_d....
2. [Emotional Design: Why We Love (or Hate) Everyday Things](http://www.amazon.com/exec/obidos/tg/detail/-/0465051359/) by Don Norman
3. [The Elements of Typographic Style](http://www.amazon.com/Elements-Typographic-Style-Robert-Brin...) by Robert Bringhurst
4. [Grid Systems](http://www.amazon.com/Systems-Graphic-Systeme-Visuele-Gestal...) by Josef Muller-Brockmann
5. [Ordering Disorder: Grid Principles for Web Design](http://www.amazon.com/Ordering-Disorder-Principles-Design-Vo...) by Khoi Vinh
6. [Why Customers Really Buy: Uncovering the Emotional Triggers That Drive Sales](http://www.amazon.com/Why-Customers-Really-Buy-Uncovering/dp...) by Linda Goodman (I've had the pleasure of meeting her and overhearing her office conversation during my daily tasks at the office in Houston, where she worked for a spell. Incredibly sharp, and it is clear that her principles exposed in this book are thorough-going in her interactions with people. I think it would be important to apply her research to Lean methodologies, building Features only around Emotional Triggers. This is what we are aiming at, but I am making this connection right now, I believe, in saying this.)
7. [Contextual Design: Defining Customer-Centered Systems](http://www.amazon.com/Contextual-Design-Customer-Centered-In...) by Hugh Beyer, Karen Holtzblatt