For state tax, not "Paying all the state tax within the year", but "Paying proportionally according to the total income so that you try to reach the upper limit of the sweet spot". For example, if you just exceed 450K, most likely, you should pay most of your current year's state tax in the next year (of course, you should figure out whether you need to avoid the state tax late pay penalty or just take the penalty but get more back from the Federal AMT).
This is not very complicated but it is difficult to explain all the details. You may just find the AMT form/instruction and use some script ( Excel?) to help figure this out.
