My go-to setup is my camera, a wireless remote, me sitting on the ground facing the window with my camera on the windowsill of whichever window has the best diffused light (our window sills are low - 2 ft off the ground). I love the remote because you can fire off a bunch of shots without waiting plus it's easier to get the focus correct since you're in the frame already.
But really the key is finding good light - bright but diffused light so it doesn't cast icky shadows onto your face. And then take lots and lots of shots trying out different angles. Yes, it feels silly, but we all have angles that play to our best features and you'll be much happier with you photos once you can figure it out which angles look best. I also find it helps to upload photos part way through so I can check that things are in focus etc because the screen on the back of my Canon is tiny (it's like 5 years old now).
Oh and I know lots of people love those in the mirror photos but I have never once managed to get them to work. The camera remote set up works much better for me.