LOL! I trust my ATOT homies waaaaay more than any random google search LOL.
Aww <3
I raved about brining in this forum before. Here it is again.
1. You must brine your chicken breast or it'll be stringly, tough, and overcooked on grill - I guarantee it. I recently learned this. Brining not only seasons the meat, but waterlogs the meat. When it's on the grill and outside is getting nicely charred, the inside doesn't dry out and remains juicy. You don't really have to brine chicken thighs though. They're juicy/fatty. Google how to brine. It's just 30-45 mins.
2. You must let the grill heat up to scalding hot before putting down your meat. This is what creates those delicious charring / grill marks.
3. Checking for doneness is easy. Just cut a small piece and look at it & eat it. No need for thermostat and timing. It's dumb obvious when chicken isn't cooked - the juice isn't clear, it has red fluid running through it, and the flesh is pink. If you ate a piece of undercooked meat, relax. You won't die.
4. Here's a basic simple grilled chicken recipe. First, cut chicken breasts to desired size/thickness. Brine it. Then pat it dry and put it in olive oil + kosher salt & cracked pepper + lemon/lime juice. That's it. Any meat is already delicious if it's seasoned (salt). Oil + season + acidity = you're basically there.