• I recommend salting the fries after frying them, just before serving and not before. Fries can turn limp and lose their crispiness if salted too soon.
• The finer the salt the better it sticks, I recommend using a salt grinder
• Don't overcrowd the basket! The larger the basket the more fries you can cook, but I recommend not to fill the basket more than half or three-quarters for the best results (But no need to put the fries in a single layer!)
• The fuller the basket the more often I recommend to shake it so the fries cook evenly
• Shake the basket every 5 minutes during cooking so the fries cook evenly
• Depending on the brand of air fryer you use, how large your basket is, and how full you fill the basket, the fries might take shorter or longer to cook
• Toaster oven style air fryers usually take longer to cook, the cooking time will increase by 5-10 minutes. Same for Air Fryers with low watt power they will also usually take a few minutes longer.
• I've tested this method in 3 different air fryers: Ninja Foodi, Ninja Foodi Grill, and Philips Viva Turbo Star

Timings for different fries

• Lattice Cut Fries:  10-11 min 
• Crinkle-Cut/Waffle Fries: 10-11 min
• Sweet Potato Fries: 16 min
• Shoestring Fries: 8-10 min
• 5 Minute Fries: 4-5 mins