How to post to multiple social networks

If you’re active on several social networks, it can be a real pain trying to keep up with all your accounts. When you want to spread around some photos of your vacation, get some recommendations for your next phone, or simply complain about the weather, having to go to each service and send the same message to each — and then return to each so you can follow any responses — is time-consuming and inconvenient, to say the least.
One way around it is to use a social network manage