My favorite piece of gear is the DJI Osmo Mobile. It helps take the muscle fatigue shaking out of my shots for the five shot method taught by Michael Rosenblum especially at times when I'm holding steady at an uncomfortable angle for an extended time.
The DJI Osmo Mobile is a three-axis gimbal stabilizer for mobile phone videography. I use my iPhone 7 Plus with FiLMiC Pro with the Osmo making the video look smooth and professional. For those times when I must be walking to track my subject, the Osmo helps smooth out the video. But, I have to walk like I'm sneaking up on someone to in order to prevent the shot from having the up and down bounce.
For added stability I use the DJI extension pole that attaches to the handle of the Osmo for two hand operation.