Momentum Within Meditation I'm curious as to what the difference is between meditation 1) with distractions / without distractions, and 2) for a long and motionless period / while in the business of motion and surroundings.

I have been practicing mindfulness in my day to day life, and I wondered whether this was not meditation, or even a complete waste. I feel as though certain states or insights are achieved in the process, but I'm really wondering the following:

Does meditation, to even 'begin' or 'gain momentum' require the succession of non-distracted states which bear a similarity to one another? I.e. by varying the type of meditation or the states one experiences, and by having some slight distractions between them, is the whole meditative effort undermined?

Also, I feel a great resistance to actually sit down motionless and attempt to concentrate on a specific point, or engage in a continuous / repetitive mental effort. I am unsure why this is, as I believe I can apply much effort otherwise. 

Ideally, I would like to practice dry vipassana, and I hope someone can answer how this would be achieved in the context of what I have explained. I am willing to expend time and effort, but simply wish to know what is the ideal way to proceed.

Thanks for any answer. (Also, how many distractions can one tolerate without too much impediment to one's meditation? Especially in regards to noise.)
Yes. 'Momentum' requires a succession of non-distracted states. 'Momentum' is a product of purification &amp; samadhi. 

Dry vipassana itself will not result in momentum because dry vipassana uses 'noting' or 'mental labeling', which are essentially 'distractions' or 'speed bumps'. It is only when the mind 'lets go' that 'momentum' will develop.

It is like letting go of a boat to flow down a river. Dry vipassana keeps the boat attached to the bank.

That said, dry vipassana is useful for developing 'sampajanna' ('clear comprehension'; 'applied wisdom'), which is a very important factor for samadhi development. 

'Sampajanna' is necessary for negotiating speed-bumps but, naturally, when a speed bump is experienced, this results in a loss of momentum, however temporary. 

The scriptures describe four kinds of meditative results (AN 4.41), the 3rd being the development of sati-sampajanna, for which dry vipassana is helpful.