Recently i noted new features on Twitter which can help us to boost our marketing on Twitter and do it better. Actually not sure how long this features are around, but not for long i guess. Now instead of using some third party websites you can use Twitter account to do more then traditional tweeting.
One of new things i absolutely love there is creating scheduled tweets which can be tweeted while you are away or having break. Use top menu. Click on "Create" and you will be able to add as many scheduled tweets as you like with assigning time and date to tweet, so you never miss busy hours to promote something you wish.
There is also some other nice options. You can have better overview what people tweeting about you as mentions. And very nice and good looking stats for your tweets where you can check and compare engagements with your account or your tweets, so you can probably test which tweets work best and what time of the day or week is best for promoting your products or affiliate links...
Hopefully you will find this useful tool to boost your exposure and follower's engagements.