Choose your own deadlines?
Unless you happen to be working with a strict Web Design agency or client, you can very often choose your own deadlines. You can decide how long something will take and in most cases, your client will have no option but to agree to it.
How to promote your work?
Every website you do promotes you, every piece of work you complete will probably be seen by hundreds, thousands, maybe more. And each of those website’s will usually have your name or your company’s name in its credits. So essentially, every time you launch a website, you are publishing an advert that promotes your Web Design skills.