diff --git a/email.md b/email.md
deleted file mode 100644
index f46cb5019..000000000
--- a/email.md
+++ /dev/null
@@ -1,25 +0,0 @@
----
-title: Email
-category: HTML
----
-
-### Avoid these
-
- * position (Yahoo, Gmail)
- * box-shadow (Yahoo, Gmail)
- * height (Outlook)
- * width in p/div (Outlook)
- * padding in p/div (Outlook)
- * data-URI (all webmail)
-
-### Basic layout
-
-    <table cellpadding=0 cellspacing=0"
-      <tr>
-        <td width=auto>
-        <td width=600px background=white>
-        <td width=auto>
-
-### Responsive
-
-    @media only screen and (max-device-width: 480px)
diff --git a/html-email.md b/html-email.md
new file mode 100644
index 000000000..cbb7eca5d
--- /dev/null
+++ b/html-email.md
@@ -0,0 +1,66 @@
+---
+title: HTML emails
+category: HTML
+layout: 2017/sheet
+updated: 201708.29
+---
+
+### Properties to avoid
+
+| Property             | Where                   |
+| ---                  | ---                     |
+| `position`           | (Outlook, Gmail, Yahoo) |
+| `display`            | (Outlook, Gmail)        |
+| `float`              | (Outlook)               |
+| ---                  | ---                     |
+| `height`             | (Outlook)               |
+| `width` _in p/div_   | (Outlook)               |
+| `padding` _in p/div_ | (Outlook)               |
+| `background`         | (Outlook, Gmail)        |
+| `min-width`          | (Outlook)               |
+| `max-width`          | (Outlook)               |
+| ---                  | ---                     |
+| `opacity`            | (Outlook, Gmail, Yahoo) |
+| `box-shadow`         | (Outlook, Gmail, Yahoo) |
+| ---                  | ---                     |
+| `rgba()`             | (Outlook)               |
+| `data-uri`           | (all webmail)           |
+
+### Selectors to avoid
+
+| `E[attr]`                  | (Outlook, Gmail)        |
+| `E:nth-child(n)`           | (Outlook, Gmail)        |
+| `::before` _and_ `::after` | (Outlook, Yahoo, Gmail) |
+| `E F`                      | (Outlook, Gmail)        |
+| `E + F`, `E > F` _etc_     | (Gmail)                 |
+
+Inline your CSS as much as possible.
+
+### Basic layout
+
+```html
+<table cellpadding="0" cellspacing="0">
+  <tr>
+    <td width="auto"></td>
+    <td width="600" background="#ffffff">
+      ···
+    </td>
+    <td width="auto"></td>
+  </tr>
+</table>
+```
+
+### Responsive
+
+```html
+<style>
+@media only screen and (max-device-width: 480px)
+</style>
+```
+
+`<style>` is supported in the head and body by everything except Gmail. Only use them for responsive styles.
+
+## References
+{: .-one-column}
+
+- [CSS support matrix](https://www.campaignmonitor.com/css/) _campaignmonitor.com_
diff --git a/jekyll.md b/jekyll.md
index e819293a5..8513dab68 100644
--- a/jekyll.md
+++ b/jekyll.md
@@ -408,16 +408,22 @@ Helpers and filters
 ### Array filters
 
 ```
-site.posts | where:"year","2014"
-site.posts | group_by:"genre"   #=> { name, items }
-site.posts | sort
+{{ site.pages | where: "year","2014" }}
+```
+
+```
+| where: "year","2014"
+| where_exp: "item", "item.year >= 2014"
+| group_by: "genre"   #=> { name, items }
+| sort
+| sort: 'author'
 ```
 
 ```
 | first
 | last
 | join: ","
-| array_to_sentence_string   #=> CSS, JavaScript and HTML
+| array_to_sentence_string   #=> "CSS, JS and HTML"
 ```
 
 ```
@@ -425,6 +431,10 @@ site.posts | sort
 | size
 ```
 
+```
+{% assign list = list | push: 'd' %}
+```
+
 ### String filters
 
 ```rb
@@ -530,6 +540,7 @@ Also see
 {: .-one-column}
 
 * [Jekyll docs](http://jekyllrb.com/docs/home/) _jekyllrb.com_
+* [CloudCannon Jekyll cheatsheet](https://learn.cloudcannon.com/jekyll-cheat-sheet/) _cloudcannon.com_
 * [Jekyll: templates](http://jekyllrb.com/docs/templates/) _jekyllrb.com_
 * [Liquid: output](http://docs.shopify.com/themes/liquid-basics/output) _shopify.com_
 * [Liquid: logic](http://docs.shopify.com/themes/liquid-basics/logic) _shopify.com_
diff --git a/sass.md b/sass.md
index cf85b91b4..cd2b62ed2 100644
--- a/sass.md
+++ b/sass.md
@@ -4,6 +4,7 @@ category: CSS
 layout: 2017/sheet
 tags: [Featured]
 updated: 201708
+weight: -5
 ---
 
 ## Basics
diff --git a/xpath.md b/xpath.md
index fe9711d18..a761d4cb9 100644
--- a/xpath.md
+++ b/xpath.md
@@ -3,6 +3,7 @@ title: Xpath
 category: HTML
 layout: default-ad
 tags: [Featured]
+weight: -5
 ---
 
 ### Descendant selectors