It's no secret the growth of smartphones and tablets is astronomical. Some studies have shown the global smartphone market is expected to grow by nearly 50 percent in 2011. Last year, 303.4 million smartphones were sold, and in 2011 it's expected that  450 million will be sold.

Tablet sales are experiencing a similar explosion. One research firm anticipates a 224 percent growth in the tablet sales in 2011.

Does this mean the personal computer era is coming to an end? Not just yet.

Although it is clear that much of the technology and marketing dollars are being earmarked to the mobile and tablet arenas, studies are showing the PC market is still growing. One study shows a potential increase in PC sales of 6 percent in 2011. But, as more and more consumers are opting for tablets over traditional laptops, it is becoming obvious that the tablet market is gobbling up the laptop market. In fact, research shows tablets will eat into some 35 percent of the notebook sales totals for 2011.

So -- from a marketing standpoint, how can a marketing professional who has been focusing on PC-related Internet marketing make the leap to the mobile and tablet world?

Internet affiliate marketers - who are among the most tech-savvy marketing pros -- are typically on the cutting edge when it comes to forward-thinking marketing methods. Here are some ways in which these astute marketers are utilizing mobile and tablet marketing resources:

* Text it! The average SMS text message is opened within four minutes (unless you are a 15-year-old, where the average is probably four seconds). Therfore, an opt-in SMS text campaign is an excellent way to quickly reach your target audience.

* Think CPL. Until smartphones become more user-friendly for forms and applications, many astute marketers are focusing on mobile technology in order to capture leads, rather than sales. Once the marketer captures the customer's request for information, a follow-up email can be sent to actually generate the sales.

* Think small. Mobile devices are signficantly smaller than a PC or laptop screen. Therefore, every aspect of mobile marketing must be downsized: the text, the images, the forms, etc.

* Compatibility is key. The various mobile and tablet devices all have different capabilities. So, when developing your campaigns, make sure they are functional for the various services: Apple®, Android, BlackBerry®, etc.

* Don't forget about the old standards. While mobile and tablet marketing is the wave of the future, make sure you continue to earmark resources toward the areas that have worked in the past. This may include: email, social media, PPC, banner ads, and more.

The PC era is not completely over. As you begin to understand mobile and tablet marketing opportunities, it is equally important to carve out part of your marketing budget for the tactics that have been working for you.