RD - Less wait time in lines, but you do spend time waiting to get in.
FP+ kiosks - Go to them while the rest of the party is doing something else, like the treehouse/TS Island, having a snack, or bathroom break.
Early lunch - usually 11am, especially at a QS
Breakfast - in the room
M&G - We skip these. We do character meals on days off or when we would have done a TS anyway.
BYO water bottle - use fountains to refill or buy extra water at meals
Parades - Don't wait for them. We usually find a spot about 15 minutes before. Someone holds the spot, while the others go to the bathroom.
Dessert parties - You don't have to wait for a show spot and you get a snack
A plan - This is absolutely the most important. I always do the personalized Touring Plans. If you know where you are going next and you look ahead in the plan while waiting for a ride, then you won't waste time trying to figure what to do or how to get there.
Bathroom - I think there's a theme here

We drink a lot of water. If the line works, go while others wait in line for attractions or food. I don't think this will work in an FP+ line.
Lines - Use this otherwise wasted time to use the bathroom, eat a snack, check your plans (even for the following days), put on sunscreen, etc.