Where are you going to get the information from?
What kind of information do you want to enter?
How many different choices are there?
Which version of Word?

If you want help you need to explain what exactly you are trying to do.

TNelly_82:

Graham Mayor is right. If you don't specify your tools and application in
some detail, it's very difficult to suggest the best solution.

If you just need to set a handful of variables for each document you create,
you might look at File > Properties > Custom. You can create as many custom
properties as you like, naming them however you want, and specifying their
values (which will act as initial values when a new document is created).

In the body of the document you refer to these properties by inserting a
field. Click Insert > Field, set Categories to All, then select DocProperty
from the Field Names list. Still in the Field dialog box, click Options, then
select the Property you want to show, and then click Add to Field. Click OK
to close all dialog boxes and insert the field.

If you change the value of the field, using File > Properties, you'll need
to update the field before it shows the new value. One of the easiest ways of
doing this in the document is to select all the text (Ctrl+A) then press F9.
You can also select and update fields one-by-one using F9. To update fields
in the header or footer, just switch into and out of Print Preview.

Bear