I'm not sure where you and Trump differ on policy, could you give me a rundown?
Strategically speaking I'd probably focus less on working with congress and the GOP establishment, and more on utilizing the power of the bully pulpit and executive authority.
I wouldn't bother with popularity. I'd probably switch party registration to independent, tweet things that specifically expose the flaws of the left, and share well produced videos about the necessity of my ideas. I'd only have cabinet members who are ideologically aligned, would not bother with appealing to the center, that kind of thing.
Probably would be more unpopular and likely to have no chance at re-election but I think I could make more of an impact doing that for four years than trying to finesse things with congress and the establishment for eight years.
I can for sure say I would admire and respect you as president.