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"Best" is ironic
Such advice will always be more of hindrance than a help.
Personally, I never do that. The tile should certainly be clear for all to see, but in games I've played, we've never gone in for such 'good advice'. Except towards the end of the game, perhaps, when there's a large playing field and maybe not many places to play the tile; then several pairs of eyes can be helpful.
As far as the philosophy goes, I'm not to keen on the idea. It can lead to conflicts, especially in multiplayer games when it can feel as if people are ganging up. Better to refrain, I think; but it is in the rules…