For a good example of a partial launch that leaves users wanting more, Look at something like Visual.ly.  They aren’t prime time yet, but they do a good job by letting a few tools to tempt the appetite for the  main course to come.  And when they do launch, they have a bit of brand capital already built up, trust, so people will be more patient with any growing pains.

Yes, avoid tweeking every pantone color looking for the “perfect one”- because that doesn’t matter.  Making sure people can log in easily does matter.  I would always have one neutral friend/ man off the street try my stuff before launch- at least one person with as little “yes men” bias as possible, and talk you through the path and experience- like IDEO often does in its design process- to see what’s clunky in advance, and then fix anything critical to functionality and get it out the door.  Perfect is the enemy of good.  You can always revise some more, whatever it is, you need a minimal standard of good.

I look at my projects like having people over to my house for dinner.  Good friends don’t mind impromptu and PB & J, cereal and eggs if that’s what we’ve got and the emphasis is on people interaction- in fact, this can be the best kind of party.  However, for business colleagues and for important family holidays, we make sure the house is clean, the food is more special, and the effort that goes into serving, using the good dishes, etc. is heightened.  It’s about making a good impression, and if things go well, they get invited into the inner circle where imperfections are more tolerated.

Make sense?

You have covered good points what should do and what don’t in Social Media. I like the way discovered the principle “Just do it”. These 5 things definitely help in crisis of website traffic dropping. But there is vast activity in social media I think to do this, such as build own network list and email list, being continuously active on social media is important to drive traffic and maintain popularity of website.