Hi,
Sorry to disappoint you there however, talking of "Impression Management"..... I couldn't agree with it.....
A) Its easier to create a great impression, but its difficult to live it all along
Do not set unrealistic expectations
B) Its better to be Assertive than being Deceptive
You may be successful with your dealings ... where you just want to create a Great First Impression [ref: MAGIC, Making A Great Impression on your Customer]
however. thats for Sales guys .....
To be "Effective" you need to be Dynamic & Honest and set realistic expectations during all your interactions ...be it the first or the last
The point is, Do you want to be Successful or Effective
Success is Just a milestone (Short-term)
to be Effective is amalgamation of all actions included and its impact on peoples perception about you (Long-term)
So you have a choice ........