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diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -13,3 +13,26 @@ This repository contains all the 0x developer tools written in TypeScript. Our h
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+
+Instructions
+------------
+
+Make sure you have `yarn@1.x` installed locally.
+
+### Creating a new sub-package
+
+1. Make sure the `name` field in the sub-package's `package.json` starts with `@0xproject/` and has a unique name (e.g `@0xproject/assert`).
+
+2. Run `yarn install` to install all it's dependencies.
+
+### How to add a sub-package as a dependency to another sub-package:
+
+1. Add the sub-packages name (declared in it's `package.json`) to your sub-packages `package.json` under `dependencies` or `devDependencies`.
+
+2. Run `yarn install` from anywhere in the mono repo.
+
+3. Import the sub-package as:
+
+```
+import {myPkg} from '@0xproject/myPkg';
+```