The main advice I'd give about using Twitter as a traffic/referral tool is that you have to INCREASE YOUR USE OF IT in order to see your number of Followers rise. It's not something that you use sporadically. If you notice, the Google headline tag is , "Twitter. It's What's Happening". The key word being "Happening". It's a moment to moment information stream about the happenings within the chosen pursuits of users' everyday lives. If you want to increase your engagement metrics (with number of Followers being a main quantifier), then you need to be in that homepage feed DAILY. At any given moment, twenty to thirty feed stream posts are occurring and it's just a ruthless user-barrage (lol!). You must be fleet of finger, and persistent of post to start to force your signal through that unruly onslaught of (potential) information overload.
I've been a user since 2011, but it wasn't until these last few weeks that I was fully able to understand the real power of constant engagement and the reciprocal response on the platform. The more I posted throughout the day and night, the more the homepage feed profile gave what I was posting about weight, and consequently, attention. Whatever you do on Twitter has the potential to connect with someone, and you have to put in work daily to stay in the stream so that you do start to attract those that you have commonalities with. I ran an experiment named #AllNightTwitter (as I'm a natural insomniac and sleep MAYBE 3 hrs nightly), where I just ran wild posting, crazying out, and just having a good ol' time in general. But, I kept it within the pool of my divergent interests. I found that my engagement efforts netted me a triple-fold increase in the number of Followers I was able to attract and am still benefitting from that surge from the experiment.
I find that when you're chronicling your efforts daily, you're getting increased exposure even in competition with all the other voices in the stream. The benefits don't just stop there. You'll start to get a more detailed overview of your daily operations and see the areas where your game needs work. As well, you'll start to get a natural sense of the posting ebbs and flows throughout the day and week, and can even prepare a blizzard of posts that can help you dominate the homepage feed during those daily ebb periods. Because of the clarity that this experiment brought me, I'm able to know how to drive traffic and convert signups to my brand-new publishing platform.