As Jack said, it depends on the type of shooting you’re doing. I do similar work as you, and recently acquired a slider. It makes a world of difference. Of course, you need to have something in the foreground for best results, just so viewers can see the movement. In addition, I’ve found that a monopod can give a nice smooth movement. Don’t go overboard with it, but it provides a nice floating feel sometimes. (Of course, you can always just put one leg of your tripod down to create a monopod.) That takes the jitters out of it. Other than that, a lot of takes and re-takes with constantly changing angles and framings will help liven up your edits.