Say you're stuck in uncertainty between two actions you're considering. They seem about equally good, but you suspect one is better, and it's not obvious which. You already have all the information to obviously collect about the problem.
For situations where getting it right really matters, try harder to get more information, and use methods more reliable than those presented here.
For lower-stakes problems:
This is classic advice. I'm just sharing it. The "innovation" here is a way to handle cases where it's inconvenient to flip a coin or do the equivalent.
This is very crude randomness, but it doesn't really have to be random, just uncorrelated with the topic of decision. You should not use a mental coinflip to try to run a fair game of chance.
There may be a bias in the length-parity of words you think of. I, so far, haven't noticed one. But that wouldn't necessarily be a problem. Once you notice such a bias, you can exploit it by assigning actions to 0/1 so that the mental coinflip bias opposes a bias you naturally have.
E.g. if you pick odd-length words more often, when the choice is between "doing nothing" and "doing something", assign "doing something" to 1. Laziness may lead you to want to "do nothing" more often than you should.
You can use the same methods here for decisions more complicated than a dichotomy.