Harmony Help Needed

Anything that doesn't fit into other topics goes here!
How would you go about making harmonies?
take a look at this
https://www.youtube.com/watch?v=WhkwmABRtp4
scale notes will be (mostly) harmonic
Let me show you personally how I do it, and maybe this will give you some ideas.

What I do might seem awkward and rather intense for some, but I think it really brings out honest sounds. I first envision the sound in my head (what mood I am in usually determines the sound). If I were you I would feel out a chord I like and then build your measure around it.

I advise against making your melody and building harmonies around it. Obviously people do it and I do it too when I'm lazy and it does sound good sometimes. But I believe "Melody and harmony go hand in hand" so they should be made at the same time ;) .

Obviously this wasn't a deep tutorial but I hope it helps somewhat :)
Thanks, that's what I was intending to do. The lazy way, of course. But now I can't, because I already have a melody going.