You can set up quality (and as such file size) in the document options (pdf options) in publisher to some lower settings.
The settings below lead to acceptable filesize for my projects.
Things that would make for big file size:
images (JPEG and such)
vectorial fills with lots and lots of dots / lines
Erwin Edel, Project Lead, Leloup Architectenwww.leloup.nl
ArchiCAD 9-26NED FULL
Windows 10 Pro
Adobe Design Premium CS5