I set a rule for myself: don't rush to click confirm when a block is full.

The feeling of queuing in the mempool is quite real; your transaction is first in line at the door, and if you offer a lower fee, you'll be pushed to the back, repeatedly hearing "It's almost your turn" only to be jumped ahead...
In the end, you might be stuck for a while or even drop out and have to start over.
What's more annoying is that sometimes you think it's just congestion, but actually someone is doing small manipulations in the sorting process above.
MEV, to put it simply, is about who is better at "snatching seats."
Validators/miners see their earnings increase, while retail investors are left just complaining about fairness.
Anyway, I prefer to be a bit slower, waiting for the chain to be clean before acting, or just giving up on the transaction altogether to avoid emotional losses and paying tuition.