Gibberish is a technique very useful for emptying the mind without getting distracted by what you're throwing out

It's generally better to be private for this, unless you have a serious thing for men in white coats. It's noisy.

This ancient technique is surprisingly powerful for something that at first can appear really silly.

Some cults abuse the practice to enhance control of their following and it works really well.

It clears the mind and makes one more open, more receptive. Respect for this practice is encouraged. If you go and get people to do this, then dump your version of "how it is", what motivation to take on, who to love, who to hate, who to despise …        if you shove that kind of thing into minds you've rendered vulnerable with this technique, and you learned it here, I'll switch to the Dark Side (Windows) and will make your downfall my pet project.

Sincerely though, there's often good reason why Mystery Schools and such kept and still keep a lot of techniques and practices out of the public domain. The most usual reason is that many techniques lend themselves to abuse, the less usual one, that some can be dangerous if not correctly supervised. The least usual is that some techniques really aren't much use at all, and they are kept secret to avoid embarrassing one's school.

I recommend Gibberish highly for clearing the mind's ruffled surface in preparation for silence, or other deep techniques. It is relaxing, but please don't use it to wind down and then turn on the TV. Please. And junk the TV anyway, or at least it's ariel.

So, Gibberish:

This is really easy.
Fly into a berserk argument / discussion / conference / collaboration / revolution / shouting match with yourself, using only languages you don't know, mixing the syntax, pronunciation and tonalities of the unknown languages in a perfectly blended discordance of pure, uncensored mental expression.

If that made sense to you, you need gibberish a lot.

Really easy:
If you don't talk Swahili, express what's in your mind, forcefully and intensely in Swahili. If you don't talk Californian (I don't), try that. The idea is to unhook the bit of the mind that translates your thoughts to speech and let the mind express through the vocal system directly. Express the mind's busyness loudly and articulately - just not in any language you know.

You'll know when you're getting it. An outpouring begins. Your passion, your love, your anger, your secrets - all your subtle possessions - your "sanity", your grip. You don't need to "get a grip" when you're stressed and overwrought - you need to stop gripping. And griping!

Persist a while - when you get into the vibe of the thing, 15 minutes is generally enough. Then do the quiet or deep thing.