I find a meat thermometer invaluable mine was bought for me as an xmas present and i have to say its been well used! When i first got into cooking i was paranoid about cooking chicken – well any meat really as i was never sure if it was cooked even though it was falling off the bone…yep thats cooked! Thermometers come in digital or mechanical. The one i use is linked on my amazon shop https://www.amazon.co.uk/shop/julesthelazycook