What you do my your stimulus package is you pull out the money from economy and put it back to the economy like taking a jug of water from a bucket and putting it back to it to stir it.Now what should be done is the treasury should buy 800Billion worth of shares or assets from the bank.Now the government should take loan from the public of the same amount that is 800 billion especially from those whom you purchased the 800 billion shares so tht the extra amount of money can be added to the economy without altering its actual state.If you take from others people in general you will be pulling the money that is working on other sector or the money that is likely to be spent.So, this 800 Billion of the previous share holders is now an stagnant money.You promise that the shar holders will have the shares back after 6 month time or a year.You promise that the profit that you get will be entitled to there account and offer them a 1% interest on the sum for this deal.In this way they will be happy because the earn a % more.Now when over the six month or a year  peroid you can manage the sum of 800 billion on the government earning through taxes and pay them as early as you earn them you can start paying as early as 3 month.Now do lunch the package at once say spend it within to the minimum 5 month and maximum 7 month peroid.Within the next three month there will be jobs created because of such large spending on stimulus and once people have jobs they will spend more and more jobs will be creted.Once people spend more businesses earn and they will have a secure job.So, its just that you need money for stimuluation.Once there is likely to rise an inflation you can sell those shares and pull back the money.But how ever more money in the ecomnomy is less likely to cause inflation unless there is product shortge.I dont say that it wont cause but its less intense as like when there is product shortage and inflation is very less likely to be caused at this stage of recession.This is how you can manage the 1 trillion $ at once on the global economic stimulus package.But do remember that on the global scale the package should be launched at once so that the impact of one economy will not hamper and will boost the over all sales.This is how you can put money into the economy and pull out when necessary