I find closing my eyes is helpful for focusing on the sensations, but if this would be weird or dangerous (eg, in the middle of a conversation or while driving), I will do my best without closing my eyes. Same with stopping what I am doing, etc. I feel like this technique has the greatest immediate effect when I can stop whatever I’m doing, sit down, and focus on the feeling entirely for an indefinite period of time. But I think the most important thing for long term progress is simply noticing the feeling in the moment and allowing yourself to feel it, even if just a little, for just a fraction of a second.

So to do it properly, I suggest not trying to do it properly. Just do it, but do it as consistently as possible.Then if you feel the urge, carve out 5 minutes per day or a couple times per day to specifically remember the feeling, and feel it uninterrupted.