Here are some links of web comic lists to help you find new web comics to read.
The last link is the list I use. Please don't ask me why. It was just the one with the original catchy name and the one that lead me directly to a manageable list without having to find hop around the site.
Beware, once you enter these lists and pick the something to read from it...There is no escape!
Seriously these things are addicting and the lists are never ending.