I was just reminded today about the limits on how many items you can have on a list.
The limits are divided by the type of fields as dictated by the Microsoft article titled “Column Limit Exceeded” Message When You Add a New Column to a SharePoint Services List .
Part of the article:
With Windows SharePoint Services, you can create the following numbers of each column type for each list or library:
|–||64 Single line of text and Choice (drop-down menu or radio buttons)|
|–||31 Multiple lines of text and Choice (check boxes (allow multiple sections))|
|–||32 Number and currency|
|–||16 Date and time|