To stabilize the telescope, tripod is the thing we have to mainly concern about. As far as I know, there are 3 ways to reduce the vibration caused to the tripod.
I shall concern about the most economic and efficiency way first as usual. It’s to place your entire set of telescope on a flat and solid surface. It’s because the solid surface can absorb the vibration well, thus your telescope is stablized. No one will doubt about this. 
Secondly, it’s level the tripod in a low level which you still can have your observation comfortably. For me, I always level it up to almost as tall as me, i.e. 180cm. The vibration is easily seen if you are using high magnification eyepiece or imager. The image which you are taken will become blur.
Last, it’s to get a telescope vibration isolation pad for each tripod legs as the one shown above. It helps to absorb the vibration caused by the surface. For example, the vibration caused by the steps of people.
