Doing a certain something, how you sit, how you hold your hands, can become a cue that reminds you how it feels to meditate.
Avoid depending on this cue. But as you learn to meditate, using the same cue again and again can help.
Choosing to always need the same cushion, the same room, the same sounds, or similar, becomes an unwise limitation on how or where you can meditate.
But a simple ritual that you can do anywhere, a simple gesture like a mudra, can help give you a cue.
Doing it roughly the same time everyday does help learning.
To meditate has a feel. Once you get it, you can go back to how it feels. You go back to it again and again. You stay with it longer. Simple things like your hands touching and a breath can remind you.