We recommend Hootsuite which allows you to connect to 35 popular social media networks such as Facebook, Twitter, Google+, Instagram, Youtube, Linkedin and more. Hootsuite lets you schedule messages for future publish, listen to what users are saying about your brand, gives you an in depth view of how your social media efforts are received, collaborate with multiple team members and many more.
There are also other alternatives to Hootsuite like Buffer, TweetDeck, SocialOomph, SpredFast, Sprout Social and Blurtster.
A must have tool you should also use is IFTTT. IFTTT lets you automate your messages on social media channels. It’s a powerful tool and statement, “If this (trigger) than that (action)”. For example, if a new item is posted on an RSS feed than post the content on my Facebook page. It can also save you lots of time if you want to share the same content throughout different social media networks. For example, if you have a Facebook page, Twitter page and Tumblr page instead of logging into each SMS page to post the same content, you can set up 2 recipes like: if new post added on Facebook then publish on Twitter and if new post added on Facebook then publish on Tumblr.