What has your Lab trained YOU to do?
IMO, often in living with our Labs over the years, although we train them to do many things, they also gradually (usually gradually) train us to react in certain ways to them.
My Bess was quite assertive in many ways -- I remember when she thought it was time for her supper, she'd somehow grasp her stainless steel food bowl with her teeth (!!) and repeatedly throw it (BANGING IT) over the kitchen floor until food appeared in it. When her 2 quart inverted water jug was no longer dispensing water to its bowl underneath, she'd bark at it until fresh water appeared. She never had to wait long for either. I learned to respond rapidly. Since we always had Doggy Doors, she never had to train me for bathroom duty.
Puff is much less assertive but gently persistent.
Her current regular times to go out for Pee & Potty relief are roughly 7-8 AM, 1:30-3 PM, and 8:30-9:30 PM. If I haven't initiated going out first, Puff's first moves are to lick my hand and look at me wistfully. If that doesn't result in my correctly reading her mind, her next try is gently touching and stroking me with her muzzle. If that still hasn't produced her desired response, her touches become much firmer and definite. If that still hasn't gotten the response she wants, then she begins panting-- huffing and puffing. That always gets my attention and I immediately put on my shoes, pick up her leash, check my back pocket to make sure it has litter pick-up bags, and we head for the door.
At night, say around 2-4 AM, if/whenever she wakes me up by nose nudgies accompanied by panting, I get up and take her out because I know it's serious.
Around 4 - 5 PM, slightly in advance of her usual supper time (5:30, her main meal), Puff unfolds a similar series of licking and nudgie reminders (short of the huff & puffs) which stop when she sees that I'm preparing her usual additive (chicken pieces & broth) to add to her kibble and to let it soak up for awhile.
Also, when we're riding in the car, Puff in the back seat with me driving, her muzzle strokes on my passenger side arm indicate she either wants water in her bowl (between the backs of the front seats), OR, more usually, that she wants her treat of peanuts. For the former, I check the bowl to see if it's dry and, if so, add water. For the peanuts, I shake out about 7 halves into my palm and reach back so she can take them. TWICE per trip is my limit and Puff graciously accepts that.
Any things your Lab has trained you to respond to?