Store a pair of fields together (numbers and text, boolean, email, telephone, Url). As normal you can specify the quantity of double fields per entity, or allow an unlimited number.
Note: D7 version doesn't support 'date'.
Don't use it for:
- links - you might have one field for the URL and one for the description, but the display widget won't let you merge them into a clickable link. That's what the dedicated link field type is for.