Customer service – This is another job that doesn't necessarily require a lot of skill or experience. Most customer service jobs I find are related to order taking and help lines, and usually require a pleasant voice, second phone line or DSL, and headset for your phone.
Sales/telemarketing/research (phone surveys) – Many people hate sales and telemarketing, but if you want to work at home badly enough, its an area worth trying. Most companies have established scripts and training so it's easy to jump right in. Like customer service, you will likely need good phone skills, a quality phone with headset and high-speed Internet access.