Influencers can help your brands reach a great deal. By @-mentioning an influencer in your post, this will help to boost your Twitter reach. The brand that you mentioned may see your tweet, re-tweet it. Thus, boosting your reach.
Hashtags can also enhance your reach. Posts that have one or more hashtags are more likely to be retweeted.
Photo and Video
Twitter is becoming more and more visual. Adding photos or videos to your posts will help your reach. More people will see it. A study done on Twitter shows that if you post a photo then there will be about a 35% boost of views and videos get a 28% boost in retweets.
With Twitter, you have to post consistently. That is where you get the most success with Twitter.