*Update*
Had the alternator checked out again. It's fine. No problems what so ever. So let's check that off the list.
I have never tried Seafoam in my car. I thought that was only if you don't want to take apart the intake manifold. You know what's funny? Whenever I brake, the car vibrates rough but when I let off the brake the idle increases to normal. Maybe a brake solenoid or something? I have to keep my foot on the brake pad pretty hard so the car doesn't move. Like it's engaged in gear at idle. I don't know...
Rear, front and driver's side motor mounts are about a year and half old. The transmission mount is 4 months old. The front motor mount has a small chip. But I don't think that would affect performance. Something tells me that the vacuum solenoid at the firewall on the passenger side that controls the rear motor mount's vacuum may have something to with the shaking and drop in idle.
I'm looking at part 14. Maybe is has malfunctioned to hold vacuum? Or regulate it? Maybe not. It could be the TPS sensor as well. It must be a sensor. What do you think?
I'll try the Seafoam.
Is the brake booster line in the DIY here on the forums?
But if that doesn't work, and you don't have any more ideas I might have to take it to a shop. Let me know what you think Hondaluver or anyone else.
*EDIT*
Just Seafoamed my car. Didn't make any difference. Intake is already squeaky clean. Does a bad IACV give you a CEL?