You're braver than me I'm very squeamish about certain foods and would never trust them beyond their use by dates, meat, milk, butter and eggs being the main ones
Meat as well but you have to be accustomed to how raw meat is supposed to smell which may be more pungent than you think.
Trust your nose. The date isn't a guarantee. I have had food within the expiry date that seemed off, I ate anyway, and it made me sick.
Use by we respect - but even then only ish. Mainly as there is a lot of slack built in that date to allow for people with a too warm fridge, or it sitting in their nice warm car for 2 hrs first.
Generally we just go the traditional route to gauge: Smell, texture, separating, colour change, etc. Milk that's turned is super easy to detect. Was even easier before homogenisation.