There are various ways around this. You can limit the number of platforms you use. Obviously you need to research which are most useful and how much time input might be required for each of them. You might outsource some or all of your social media marketing to a suitable marketing agency. Furthermore, you'll need to keep an eye on what they're doing, and agree the strategies and targets to begin with. You can use tools to make your input more efficient. There are various applications to automate your tweets, to combine your various platforms by duplicating messages to some or all of them. Used with care these can work well.
Newtricks can help you achieve you goals. We hold frequent seminars on different aspects of social media. We offer tailored consultancy to get you moving on the right track. We can set you up with a suitable selection of platforms and a 'game plan'. You can outsource work to us.
Drop us a line to discuss your social media marketing strategy further. There's no commitment. We won't blind you with jargon. We'd like to help you succeed.