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Hootsuite is fabulous for doing just that. I've been using it for more than a year. There's a paid version and a free version. If you're the only one working on it, you have fewer than 5 social networks, and you don't care to see link reports the free version is fine. the paid version is $5 per month.

positive thinking

?

But ya... I think Egol is right. What are his objectives?

What business are you guys in?

My opinion....

Linked In if you need to make contacts/relationships with other vendors. It's the most professional way of doing this. But I don't use linked in so I can't say much.

Facebook is a must IMO

Twitter if you want to make contacts and relationships with other vendors. I've made some good relationships here... it's easy and candid.

Re Google +1. I think you might have a google +1 account automatically if you have a google account. I'm not sure if you're +1's are automatically related to that account though? I haven't been paying much attention to google +1 stuff

Hootsuite is a web-based application. Tweekdeck is something you have to download to your computer.

There are a few others but I can't remember what they are right now.