Resources are always a help!

When it comes to books, try these:

Designing Effective Women's Ministries [Paperback]
Jill Briscoe (Author), Laurie Katz McIntyre (Author), Beth Seversen

Building an Effective Women's Ministry: *Develop a Plan *Gather a Team * Watch God Work by Sharon Jaynes

Fresh Ideas For Women's Ministry: Creative Plans and Programs that Really Work! [Paperback] Diana Davis

Connecting Women: A Relational Guide for Leaders in Women's Ministry by Linda Lesniewski (Paperback - Nov 1, 2007)

Women's Ministry in the Local Church by J. Ligon Duncan and Susan Hunt (Paperback - Jan 17, 2006)

Designing Effective Women's Ministries [Paperback]
Jill Briscoe (Author), Laurie Katz McIntyre (Author), Beth Seversen

The Complete Leader's Guide to Christian Retreats, by Rachel Gilmore

On the web try these:

http://todayschristianwomanstore.com/womensministry.html
http://www.womensministry.net/

http://www.applestar.org/Womens%20Ministry/womens_ministry.html (from a specific church, but full of outside resources).

http://www.alawoman.com/womensministryresources
(full of links to other resources)