To get more visitors:
If you search around online, you can find sites that allow posting your channel information to help get visitors. You can also include channel information in your signature on the majority of forums. However, make sure that you don't just stick info like that in your signature, then post once or twice with useless posts just so your sig is seen. Instead, find boards that you like and can be active on. Not only will that keep your message from being removed for spamming/advertising, but it gets your name out even more because you post more.
Our main chatting rules are no advertising of channels or websites unless absolutely necessary (or where they are related to the channel's topic), no SHOUTING, minimal to no swearing or perverse talk, no inappropriate nicks, no attacking/flaming others, and listen to the ops.
The most important thing, as mentioned above, is to make sure you only op people you can trust. We ran into problems on my channel (not the one displayed in my sig) where some of the ops decided to "rebel" and wanted all the rules loosened so people could flame each other and so there was no rule about swearing and perverse talk and similar. Ended up causing a very large division in the channel. Best to keep the number of ops to a minimum (only enough to run the channel and hopefully have at least one op there about 75% of the time if possible) and to make sure you can trust them.