Our daughter gave us a toaster oven/air fryer
for Christmas.
So far we have confirmed it will make toast, and tonight I cooked up some pork chops. They came out very well.
So what kind of tips do you folks have for an air fryer?
= new reply since forum marked as read
Mainly use mine for onion rings and tater tots, time to expand my horizons.
I have one and literally, except for when I cooked a turkey a couple months ago (not for Thanksgiving), I have not used my regular oven in a year. 
My Breville (Smart Oven with air fryer) fits up to 9x13 pans (at least those without large handles) and most of the pans/baking dishes that I use can fit in there (including a 3.5 qt dutch oven with lid). I haven't tried a skillet yet but the long handle might be the limitation (maybe an 8" could go in mine but haven't tested). I can fit a full 10-cup bundt pan in there (just tried it). The past year, I even found some small (13" x 8 1/4" ) USA Pan cookie sheets that will fit right in the slot if I take the rack out and I have been doing my cookie baking with those (and they sell the small pre-cut parchment sheets that go perfectly on those). So any kind of baked goods work well (I even made some spinach/feta spanokopitas in there last year and plan to make an 8"x8" pan of corn bread today). Pies also work in there and I have even made quiches (in pie plates) using it.
I have also made a pot roast in there (slow cook in an oval dutch oven with a low temp using the Roast function that has an adjustable temp and timer up to 2 hours that you can just add more time to if not done yet).
What I have had to do is keep a running list of times/settings for things I frequently cook as my regular oven is not a convection type and the Breville has different convection settings (or an option to not use convection at all), so I have had to adjust some times.
What is great is that some types of cooking will really shine with that convection option so you get a wider variety of outcomes from the use of it. If yours has that basket for air frying, one of the tips I have seen (and have used on occasion) is a non-stick insert to go in the basket to make clean-up easier. And regarding clean-up, I discovered the Mr. Clean Magic Eraser sheets a couple years ago and those have worked great to clean the inside and the glass front.
The air-fry is obviously great for things like (potato) fries but that means any types of food that normally gets fried (including deep-fried), including other veggies (I make air-fried match-stick parsnips to get them crispy versus roasted) work great in there. One of the things to make sure to do for the veggies since you are not deep-frying, is to still get some kind of light layer of oil on the food, and that usually means a spray/squirt while it is in the basket or what I often do, coating the veggies in a bag with a little oil and seasoning and then putting it in the basket. Periodic spritzing the stuff in the basket with some kind of oil when checking/turning (if needed) helps to brown it on the outside and seal the moisture on the inside. I've also tried bacon in it for the heck of it despite not being a bacon person (have to play around with the timing and temps to get it the way you like).
There are more and more books of recipes appearing that are aimed at air-fryers but note that the standalone "air fryers" operate differently from the toaster oven air fryers (one of my sisters gave my other sister a Ninja air fryer for Christmas so now they both have that type but I prefer my toaster oven/air fryer because it is more versatile for me).
