There are a number of excellent Landlord Associations [see Useful Contacts for Landlords] and it is worth considering paying to become a member. Membership fees and benefits vary, so it is worth shopping around to get an association that suits you.
As a member you will usually get a regular newsletter giving advice and an update on housing law or policy as it changes.
You can usually get discounts for services for landlords such as insurance. You will also learn of new services you may be interested in.
You might be able to get individual advice if you have a problem. Through the network of other members you may get ideas to resolve problems or how to manage your property more successfully. There are usually periodic meetings where you will have the opportunity to meet other landlords.