Below you will find some of the common variables you can use in Email messages and the HTML templates.  

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Order “Thank You” message:
##ORDERNO##

Gift Certificate email message body:
##GIFTCODE##
##GIFTTO##
##GIFTFROM##
##GIFTAMOUNT##
##GIFTMESSAGE##

Affiliate Password Recovery email:
##CUSTNAME##
##DATE##
##PASSWORD##
##AFFILLINK##

New Affiliate confirmation email:
##AFFILNAME## - Affiliate’s Name
##AFFILID## - Affiliate ID
##AFFILPASS## - Password
##AFFILLINK## - Affiliates URL

“Email A Friend” email message body:
##SENDERNAME## (can be used in subject and message body)
##MESSAGE##
##ITEMNAME##
##ITEMDESC##
##ITEMNO##
##ITEMURL##

Password recovery email:
##CUSTNAME##
##DATE##
##PASSWORD##

Order Confirmation email message body:
##ORDERNO##
##CUSTNAME##
##DATE##
##ORDERLINK##
##CUSTNO##

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Main Template File:  template.htm
Main Content/Data
##TITLE## - Meta Tag data - Page Title
##SITEDESC## - Meta Tag data - Page Description
##KEYWORDS## - Meta Tag data - Page Keywords
##SLOGAN## - Top/Logo
##MENUTABS## - Menu Tabs
##BANNER1## - Top Banner
##IMENU## - DropDown Menu
##SEARCHFORM## - Search Form
##CHECKOUTBUTTONS## - Checkout related Buttons/Links
##AREA1## - Area 1
##AREA2## - Area 2
##MENULINKS## - Menu Links
##BOTTOMBANNER## - Bottom Banner

Column Related
##LEFTCOLUMNWIDTH## - Left Column Width (percentage)
##LEFTCOLUMNDATA## - Left Column Content
##SPACERCOLUMNWIDTH## - Spacer Column Width (percentage)
##MIDDLECOLUMNWIDTH## - Middle Column Width (percentage)
##PAGEDATA## - Indicates center of page (where the requested page's content should appear)
##MIDDLECOLUMNDATA## - Middle Column Content
##SPACERCOLUMNWIDTH2## - Spacer Column (2nd) Width (percentage)
##RIGHTCOLUMNWIDTH## - Right Column Width (percentage)
##RIGHTCOLUMNDATA## - Right Column Content

Font
##PDFONT## - Main Font

Table/Cell Alignment
##MMTABALIGN## - Menu Tab Alignment (ex. Left, Right, Center)

Background Colors
##BGPAGE## - Entire Page background
##BGBANNER1## - Top Banner Background
##BGBANNER2## - Area 1 Background
##BGBANNER3## - Area 2 Background
##BGBANNER4## - Bottom Banner Background
##BGBANNER5## - MenuLinks Section Background
##SBANCOLOR## - Search Banner Background
##HDBGCOLOR## - Headings Background
##BUTTBGCOLOR## - Button Background

Border Colors
##BORDSECTOP## - Entire Top Section
##BORDSECBOT## - Entire Bottom Section
##BORDBANNER1## - Top Banner
##BORDBANNER2## - Area 1
##BORDBANNER3## - Area 2
##BORDBANNER4## - Bottom Banner
##BORDBANNER5## - Search Banner

Text Colors
##HDTXCOLOR## - Headings Text
##MMTXCOLOR## - Menu Tab Text
##BUTTTXCOLOR## - Button Text
##PDCOLOR1## - Category Name
##PDCOLOR2## - Category Short Description
##PDCOLOR3## - Item Name
##PDCOLOR4## - Item Short Description
##PDCOLOR5## - System (general) messages/text

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Top Level Category Template File:  template-sub1.htm
##CATEGORYNAME##
##CATEGORY##
##SUBCATEGORIES##

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Custom Menu Template File:  template-sub2.htm
##PAGENAME##
##PAGEURL##

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Featured & Related Items Template Files:  template-sub3.htm, template-sub4.htm
##IMAGE##
##ITEMNAME##
##ITEMNO
##SHORTDESC##
##ADDTOCARTBUTTON##
##MOREDETAILBUTTON##
##PRICE##
##STOCKMESSAGE##

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Current Category Template File:  template-sub5.htm
##NAME
##SHORTDESC##

Article Applies to: ASP.NET (Microsoft's .NET), PDshop .NET