Did you know that email marketing’s ROI was about $45 for every $1 spent on it in 2008? Without a doubt, email marketing has become one of the most effective methods of direct marketing. When done properly, an email marketing campaign costs almost nothing to launch and maintain, and it generates a ton of revenue for your business.

Now, there’s a saying in email marketing (and direct mail marketing for that matter) that goes like this: It’s all in the list. In other words, without a good email list, your marketing efforts will be crippled. Building your own list is the best way to create a highly targeted subscriber base that responds to your message.

Here are some tips to help you build a strong list for email marketing.

• Place signup forms on all pages of your website—Not everyone is going to be arriving at your website through the homepage. Because so many people use search engines, visitors could land on the deeper pages of your website. That’s why it’s so important to have signup forms for your email list on every page of your website. To get the highest response, place your signup box above the fold, and have a simple call to action by it (e.g. Get a FREE copy of my new eBook (Insert Title Here) when you sign up for our email list!). Some studies have shown that placing a simple privacy disclaimer, like, “We value your privacy”, underneath the signup form can also improve your conversion rate.

• Have a signup link in all emails you send-If you’re like me, you’re emailing back and forth with clients, prospects, and colleagues all day long. One simple thing you can do to get a few more subscribers is to include a signup link for your email list in your email signature. Again, offer a straightforward call to action encouraging readers to sign up.

• Offer a freebie for signing up—Sometimes, you need to give people an extra incentive for taking the action you desire. One of the most effective ways to motivate visitors to subscribe to your website is to offer them a freebie in exchange for doing so. This can be something as simple as an eBook or a whitepaper. You could even try to tempt them with a special coupon offering a discount on your products or services.

• Keep the registration process simple—If your registration form has 20 entry fields, you’re doing it wrong. Remember, people are generally a little wary about giving you their information as it is, so forcing them to complete a long, detailed registration form is only going to scare them off. Ask only for the most basic information (name, email address, location) so that they can signup in just seconds. The easier you make it to sign up for your email list, the higher the number of people that will sign up.

• Have a physical signup list at your store and at events you attend—Look offline to build up your email list. If you have a physical storefront, have a signup list in your store, or you can ask customers at checkout if they’d like to subscribe to your newsletter for special deals. Also, if you attend trade shows and conferences, bring a signup list with you for your booth.

Do you use email marketing for your business? Share your experiences in the replies.