Things I would not do. Basically anything that Joe did, do the opposite.
In 2014, when Joe was VP and lead person on Ukraine, I would not have refused to give lethal aid to Ukraine. And when Ukraine used our training to try to take back Crimea, I wouldn't have chastised the Ukraine government for trying to resist Putin.
When Putin built up forces on Ukraine's border to restart hostilities in 2021/2022, I would not have cowardly evacuated all US personnel from the country. I would have surged more in to deter.
When Putin restarted invasion in 2022, I would not have conditioned lethal aid on not shooting across border, tying Ukraine's hands. Instead, I would have conditioned it on attacking any military or military supporting targets anywhere in the theatre of war. Since Russia has defined the boundaries of this as well within their country, they only have themselves to blame for how deep these weapons would reach into Russia. Then we wouldn't have the ridiculous situation we just had where Putin was able to get his forces ready for the Kharkiv offensive in plain view, but Ukraine was not allowed by Joe to attack them until they actually started crossing the border.