1. Provide good content - The most compelling reason for visitors to spend more time at your website is the magnetism of its content. Therefore, present them with captivating content that they can't find elsewhere and they'll have a reason to stay on your site a little longer.

2. Make content printable - Give your visitors the option of printing content they can read at leisure, later. While they print, chances are they'll browse through your online store, or scroll down to learn more about your product or service. This way you can keep them longer at your site.

3. Offer free software - Develop a relationship with visitors by offering them free software that they can download directly from your site. While doing so, they may spend time to learn more about what you are offering. Giving a freebie for filling out your online survey is also another way to keep them happily glued to your site.

4. Include an informative directory - Provide your visitors with a comprehensive, online directory of information that they can search. If it includes information that's useful and relevant to what they seek, it'll be a reason to stay longer at your site.

5. Ensure quick page loading - Slow-to-load, web pages can annoy visitors. Therefore, ensure that all your web pages can be loaded quickly, or they'll leave just as fast because time is precious to them.

6. Build trust in your visitors - Present your company's credentials early on. Once visitors are convinced that your business sounds legitimate, it will not only make your offer seem honest but will also give them a reason to stay longer at your site and learn more about you.

7. Give visitors the control - If your site's online applications and navigation have been designed logically, it will compel visitors to stay longer and find what they want. Giving them control of the experience is also a convincing reason to return.

8. Update content periodically - Viewing the same old content can be a turn off for repeat visitors, as they'll be searching for 'What's new', each time they return. Therefore, try and offer something new when they do, e.g. new, product information, graphics, offers, company news, links, etc.

9. Design user-friendly, labels and links - This ranks high during a visitors overall web-browsing experience. Therefore, for your active links, use call-to-action, phrases or sentences rather than single words on your labels. Moreover, logically designed labels and links can motivate your visitors to stay longer on your site and learn more, in a sequentially convenient manner.

10. Maintain professionalism - Ensure that your site is designed in a manner that delivers professional visual appeal at first glance. In addition, use attention-grabbing images, headlines and sub-heads, motivating text, benefits clearly articulated upfront and a unique selling proposition that's spelt out loud and clear.

To wrap this up, here is an important bit of advice. To keep visitors at your site longer, it should ATTRACT them to explore, MOTIVATE them to move from page to page and PERSUADE them to return.