This is a very important step, especially if the genre of your video as a high view count.Besides posting your videos as responses to your other videos, make sure to post them as responses to other highly viewed videos in your genre of video.For example - say your genre of video is a comedy video to do with stand up. Find a well viewed high rated on YouTube under the tag of e.g 'comedy stand up' and post your video as a response to it. You will be surprised how many people will start viewing your videos. It's simple but very very effective. Obviously if a popular video on YouTube has lets say 50 million views with an average of 10000 views per day. If your video is a response to that video, thats 10000 more people having the chance of clicking on your video.

Post links to your YouTube channel and/or video on discussion boards.

So, lets say the genre of your YouTube channel or video is 'comedy stand up' find out online comedy websites, or discussion boards and offer up your channel in a post. Remember don't spam! this will just associate you with crappy Youtube SMM panel and non proffessional material. Join a comedy messageboard, and from time to time you may be able to slip in the name of your YouTube video in a post or make a new thread discussing something and mention the name of a funny video you found, you don't even need to say you made it. It's the view count that matters

Make a website dedicated to your YouTube channel

This one may take more time, but having a website to go with your YouTube channel, is a very legitimate addition. It demonstrates your professionalism and has the potential to reach a much greater audience and is obviously easier to link to. A great example of someone who does this is hotforwords.She is YouTubes no.1 guru and the most consistently watched channel. See what I did there, many of you will probably click on that website, the same can be applied to your YouTube channel.