How do you remain engaged and active across all of the major social networks?

Hi,

I'm starting a blog soon and finding it very difficult to maintain multiple social network accounts and remain active amongst all of them.

At the moment I'm using twitter, facebook and google+ but overtime find I'm favoring one over the other due to the trouble of having multiple accounts.

My question is how do you remain engaging and active amongst numerous social networks when your just one person and quite timestrapped?

Thanks a lot