I don't know if it'll work in a solo setting but in group singing, it's useful to soften the harder consonants, especially those at the end of words to prevent 'machine gunning' - that repeated 'd' or 't' that sounds like a gunnery range.

Soften the 's' to a 'th' so you lose the snake effect and turn final 'p's into 'b's to stop the mic getting drenched if you're a dribbler.

There are other tricks but I'm at work and can't practice them through to get the right sound!

LTS