The Web is growing at an amazing rate. Today there are more Internet Service Providers than there were Internet users in 1995. Only a few have been able to monitor the Web's growth from the very beginning to what it is today. The primary problems Web builders face today are related to the fact that the Web is emerging from toddlerhood into pre-adolescence and exhibits some serious growing pains as a result. Bandwidth is a big issue.
Proliferation is another concern.
The more sites there are, the more you have to do to differentiate your site from competitors'. This in turn leads to a desire to make your site snazzier, cooler, more leading-edge. But that effect is a double-edged sword because now you're fighting bandwidth and expecting more of your visitors. The steps are simple. Constantly adjust and adapt.