Spend on infrastructure and other areas where the multiplier is high. Raise taxes on the upper brackets, cut all loopholes. That's just a start.
Raising taxes on the rich is not done for the revenue but rather symbolic to appease the middle and lower classes who believe that the rich having prospered substantially over the decades while they feel they've been left behind. Printing countries can run deficits now with ease but that'll change when Europe finally turns.