I'm just curious...several members have mentioned that they post books to wish lists.  Other than going to "club wish lists" and individually checking books you have, is there an easier way?  I don't plan on doing this, just interested in how it's done.

I do this a couple of ways:

If I know a buddy of mine has it on their WL, I ask them if I can post it to them and then I go to their WL and post it to them. Usually because I am sending them a game book as well and this saves me postage.

Or if I have several WL books I can send, I will offer them in the WL threads in the genre forums and post it to whomever asks first.

I almost always check the WL of someone who requests a book from me. If I have another of their WL books and I have time to read it-I'll ask if I can post that one to them as well. 

I suppose some people might just check the WL of random people and try to do it that way.  But would be too time consuming to me.

From the help center:

Can I post a book directly to someone's Wish List?

Yes.  If you have a book that is on someone's personal Wish List, then all you need to do to offer that book directly to that member (and NOT to the first person on the Wish List) is to go to the member's Wish List and click the button there.  Be sure the ISBN on your book matches the ISBN on her Wish List!

• Your book will be offered to that member first, no matter where she is in the Wish List for that book.
• If that member does not request the book, it will then be offered to the first person on the wish list and continue to be offered until someone requests it or until it is Posted into the general library.

We hope that members do not do this too often, as FIFO is really the fairest way of swapping books, but they are YOUR books, and we wanted to offer this option to members who wished to use it.