For some creative professionals they use cintiq or intuos.You dont have to be a professional but they can be quite expensize.http://www.wacom.com/productinfo/
But if your a begginer you might want to use wacoms bamboo.http://www.wacom.com/bamboo/
There's bamboo pen $69,
Overview
Bamboo Pen gives you everything you need to enjoy pen input. Start using the pen to edit, mark up documents or collaborate with others. Doodle, sketch and personalize your materials. Or use the pen with the included Corel® Painter® Essentials to paint and make digital art. The ergonomically-designed pen fits comfortably in your hand, and the tablet's textured work surface makes you feel like you're working with a pen on paper.
Bamboo Pen is a smart solution for anyone who strives for clear, visual communication. Write with digital ink, mark up documents and presentations with your own handwriting, draw quick sketches, and explore your creative side.
Bamboo Pen works with your existing computer: desktop or laptop, PC or Mac. Sleek and black, it makes for a stylish addition to your workspace. Attach Bamboo Pen to a standard USB port, set it comfortably by your keyboard, and let your ideas flow.
Bamboo pen and touch $99,
Bamboo Touch lets you add Multi-Touch input to any computer. Navigate, scroll, and accomplish all your tasks using simple hand gestures. With the tablet's ample touch area, there's more room to navigate than you'd experience with a mobile device or a traditional laptop trackpad. Bamboo Touch makes it easy to move around your desktop, scroll through documents, navigate the web, zoom in and out of photos, and rotate images.
Bamboo Touch works with your existing computer: desktop or laptop, PC or Mac. Attach it to a standard USB port and set it comfortably by your keyboard. You can even customize your Bamboo Touch experience by assigning your own shortcuts to the four ExpressKeys™. No matter where you're heading, Bamboo Touch will help you get there faster.
Bamboo fun $199
Overview
Bamboo Fun lets you get hands-on with your creative projects, combining the benefits of Multi-Touch with the comfort and precision of Wacom's ergonomically-designed pen.
With Multi-Touch, you can navigate, scroll, and work with simple hand gestures. With the tablet's large touch area, you have more room to navigate than you do with other touch devices like computer trackpads and mobile phones.
Need precision? Pick up the pressure-sensitive pen to draw, sketch, edit photos, and add handwritten elements to your creations. The generous size of Bamboo Fun gives you lots of space for creative freedom, making it simple and comfortable to use.
Bamboo Fun works with your existing computer: desktop or laptop, PC or Mac. Attach it to a standard USB port and set it comfortably by your keyboard. You can even customize your Bamboo Fun experience by assigning your own shortcuts to the four ExpressKeys™.
Available in a stylish silver color, Bamboo Fun will complement your current setup. And it includes valuable additions that make it ideal for your creative projects.
Bamboo craft $129
Overview
Digital scrapbookers, memory makers, and crafters: Bamboo Craft is the perfect tool for unleashing your creativity! Get hands-on with your projects using both pen and Multi-Touch input for your computer. Multi-Touch enables you to navigate and work with your creative assets quickly and easily. The pressure-sensitive pen lets you create your own art, edit photos, add embellishments, and provide a personal touch with your natural handwriting and doodles.
Bamboo Craft lets you take a hybrid approach to your scrapbook and craft projects, combining the best of both worlds: working digitally with your tablet makes every creative idea possible and printing your work allows you to finish your craft with a beautiful, traditional result.
Bamboo Craft works with your existing computer: desktop or laptop, PC or Mac. Attach it to a standard USB port and set it comfortably by your keyboard. You can even customize your Bamboo Craft experience by assigning your own shortcuts to the four ExpressKeys™.
Available in a stylish silver color, Bamboo Craft is your complete scrapbooking and crafting companion. Bamboo Craft includes valuable additions to enhance your creative projects and turn your computer into a powerful creative craft workstation.
Hope I helped:)
Here's how it look's like when you use it
http://www.youtube.com/watch?v=cq3C3Akq44M