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Make Twitter, Facebook, and Instagram accounts that are dedicated to your stream. Then, post on them whenever you’re going live on Twitch so people know to watch you. You can also use your social media accounts to interact with your audience and fill them in on any important stream-related updates.  For example, you could post something like "Going live later at 5 PM EST. Streaming Hearthstone @ twitch.tv/(NameOfChannel)." Don't forget to include your timezone so viewers know exactly when to tune in. Include links to all your social media accounts somewhere on each account so people can find you across multiple platforms. Look for active gaming forums and post a comment that includes a link to your stream, the name of the game or activity you’re streaming, and what time your stream is at. Forums are a great way to find like-minded individuals that might be interested in tuning into your stream.  For example, you could post "Hey everyone, I stream League of Legends every weeknight at 6 PM PST. Check it out at twitch.tv/(NameOfChannel)." Try to find forums that are dedicated to the particular game or activity you’re going to be streaming. For example, if you’re going to stream yourself playing Overwatch, post about your stream in Overwatch forums or anything related to it. Avoid posting in the same forum more than once in a day so people don't think you're a spammer. If you have friends that are gamers or avid Twitch users, see if they’ll share your stream with people they know. Offer to post a link to their Twitch stream on your social media accounts if they do the same for you. Over time, as your Twitch following grows, you can help each other out by promoting each other to your subscribers. Attending a Twitch convention and meeting other streamers is a great way to get your name out there. You’ll also be able to sit in on sessions that are designed to help streamers grow their audience and be more successful. Bring business cards with your streaming information on them so you can hand them out to people you meet at the convention.  TwitchCon is an annual Twitch convention that attracts streamers and viewers from around the world. You can find out more about TwitchCon at https://www.twitchcon.com/. To find smaller Twitch conventions and meet-ups in your area, search online for “Denver Twitch conventions” or “New York City Twitch meet-ups.”

Summary:
Set up social media accounts for your stream to promote yourself on. Promote your stream in online gaming forums. Ask your network of friends to help you promote your stream. Network with other Twitch streamers at a convention.