I have pretty good luck with following the recommended timings I find online. Yesterday I went to the Borough Market and picked up Venison medallions and boneless quail, two things I've never grilled before. Did a few Google searches to find suggested grilling times and followed them to a tee. Both turned out perfectly without having to cut into them, and thanks to the suggestions about resting them in foil and throwing back on the grill before serving, they were perfect. Needless to say, I'm not an instinctive cook