LPT: Use an infrared thermometer to check for drafts around windows, doors, electrical outlets, it doubles as a quick cooking thermometer. They cost under $20.

Got one last year, was surprised at how cheap and effective it is.

Our house is relatively new yet the downstairs gets frigid, my wife mentioned that the windows felt drafty yet they were solidly shut. We used this and found very slight cracks in the chaulking that were letting cold air in. After using it to find all the weak spots and rechaulking along with fixing some door insulation and closing a flue the house is much more comfortable.

Bonus: you can aim it at pans/foods and tell temps within a few degrees (surface only of course).

Double bonus: Aim it at your SO and say you found something hot.

You can get them on Amazon shipped right to you and the batteries last forever, enjoy!

EDIT: Yes, you should check meat for an internal temperature prior to eating, should that be it's own LPT?