As the guild grows larger it would be a good idea to hold activities that would keep the members interested. A weekly "guess this animal" contest or something would keep members active and keep their brain from committing suicide.
Or scheduling a Saturday get to gather in the towns every so often for members to meet up and chat.
Project to promote activity and such. Maybe hold something like a "singles night" for roleplayers to find roleplay partners.
And a Member or the Month/Week to show others that you have active, friendly members in your guild to draw more people.