In order to fully enjoy Skype's capabilities you'll need to use several accessories such as earphones and a microphone. However, not all earphones and not all microphones which are available on the market are necessarily Skype compatible and are therefore not liable to provide you with the best possible experience.
Because of that, there are certain accessories which are Skype Certified. This means that these products have been tested by Skype's professionals and have been approved as Skype compatible. This way you'll know that by using these products you won't have to suffice with poor audio or video quality or with products that altogether do not support Skype.
How is it done, you ask?
In order to purchase these products directly from Skype's website, access Skype's online store and select the relevant category:
Make sure you choose products which are most convenient to you, in respect to connecting them with your computer (USB, etc.) and that you choose products which are in your price range. There are several categories available which contain products manufactured by numerous providers, so there's quite a plethora of products to choose from.
In order to reach an educated and wise decision it's always smart to check what other users have to say about the products you're about to purchase.
After ordering the accessories that have been tested and approved as Skype Certified, simply install them and start enjoying high quality video calls.
And, you're done! You've gotten all the necessary accessories in order to enjoy high quality video calls. Now, it's time to start talking!
Good luck!