OLD To Do List

Here's how MT handles the thing.
We need compatibility with that as a minimum.

# Entry Body
# Extended Entry
Collectively these two fields make up the body of your entry. You can use the two fields however you like: you could split up your entry over the two fields, or you could completely ignore the Extended Entry text and enter only the Entry Body text. Movable Type allows you to split up your entry for more flexibility in the display of that entry; for example, if you write very long entries, you may not want your entire entry on your index pages. You can use the two fields to control what gets displayed, and where.

# Excerpt
You can enter an excerpt from your entry, or use this field to provide a summary of the content therein. If you do not provide an excerpt, it will be automatically generated (when specified in a template using the MTEntryExcerpt tag) by selecting the first twenty (20) words from your entry, followed by an ellipsis.