Hello,
Any time we can stop our internal dialogues and rationale-seeking brain, we have an opportunity to look into other realms. ‘Scrying' is a term that refers to that process, when material ‘objects’ (if smoke and other formless matter can be considered material) are used to stop continual chatter and instead focus intent on non-physical realms.
Before scrying can be effective one has to give up any negative feelings. A scryer might think he has to concentrate harder but it is that process that leaves no room for negativity. So why not go directly to Bruce Moen’s technique of remembering a love-filled moment? Putting oneself in tune with loving feelings from the start keeps a lot of negative influences from intruding, such as happens with an ouji-board.
One trouble with such props are that they come with their own associations that can cloud our minds. For example if you scry with smoke, you might unconsciously recall a fire that threatened you when you were a child, and your attempt to contact information beyond the physical could be tainted by that.

We --you -- don’t need material ‘props’ to reach non-material realms.
Betson