I want to welcome you all to the wonderful world of layering. In here its filled with many different colors, textures, and...layering. But don't rush in too quick young lads. For there are a few minor rules that you must adhere to. I'll give you a quick breakdown so that you wont get buried by the wrong layers (ha, I made a funny).
Rule 1: Start small and build your way up.
The first layer should always be the thinnest. It just makes sense to do it that way. How hard would it be to throw a t-shirt over a sweater? Besides, even if you could do it, you'd look utterly ridiculous. Every time you add a layer it, should be a little heavier than its predecessor. Think of each piece having a "grade" or "level" number for thickness. You always start with your smaller levels and then work your way up.
Rule 2: No repeats.
Keeping with the same "grade/levels" analogy, never repeat grades. Its a waste of time and space. For example, a cardigan has no business being placed on top of a sweater. They're both on the same level and they're both typically made out of wool. To me it would just present an unflattering look. There are way too many other options you have to choose from.
Rule 3: Get textured
This is the time to have yourself a texture party. I think it creates a more interesting look. For example here: you have the denim shirt, cable-knit sweater, tweed blazer, and nylon down vest. Also you can have fun with the colors too. Here I have a few shades of blues and greens, then pops of red. And for some added character there's all kinds of speckled colors in the blazer (a Harris Tweed trademark).
|Denim Shirt~Polo Ralph Lauren (thrifted), Tie~Schreter (thrifted) ,Cable Knit Sweater~Tommy Hilfiger, Blazer_Lord and Taylor made with Harris Tweed, Down Vest~Gap, Chinos~Dockers, Belt~Dockers (thrifted), Desert Boots~Clarks, Watch~Timex|