Don’t salt your food before tasting it, it’s insulting to the chef/cook since it looks like you don’t trust their cooking.
There’s a popular story of someone being taken to a restaurant for an interview with their potential boss and the candidate being rejected because they salted their food before tasting it. The interviewer took it to mean the candidate wasn’t trusting, was opinionated, and didn’t respect the food or the chef and they didn’t get the job.