I don't sort when putting dirties in the laundry bin, I just sort as I put in a load --but I will go through everything and sort it, if I have a ton of stuff to wash. I do towels / sheets separately. I do laundry every morning and evening. Usually I will sort whatever laundry is in the bins next to the washer. Then, if I feel the load is light, I'll go to the bedrooms / bathroom / hallway and see what else can go in the same load. I must admit that I'm really picky about putting loads together. Also, with swimming, beach, and the other dirt my family gets on their clothes, I don't like to pack the loads super full. In addition to that, I'm very careful to line dry new tops, stretch pants, dress pants, panties,
etc. so as not to shrink, pull or ruin them. I try to do a load of delicates at night, so I can hang them to dry. It's nice to have clean and dry underpants and bras in the morning.
I really try to wash clothes using a first-in-first-out system. That way, the clothes aren't sitting there forever, waiting to be washed. Even if that means a really small load now and then. And if I do a small load, I try to make the next one a big one. And I'm really careful not to wash whites with bleach, then follow that with a load of blacks. We don't have a ton of whites, so I'll save them for a while and then do a couple of loads of whites, followed by running a clean cycle. I have an HE machine, so I need to do a clean cycle once in a while, since it uses less water, and there can be buildup.
All day I alternate between washing things that can go in the dryer, and things that have to be hung to dry. I'll put lots of stuff in a color load, and will put out some things to hang dry, and others from the same load that can go in the dryer. Sometimes I do load after load of things that can go in the dryer, so that the dryer runs nearly constantly. Seems like clothes dry faster, that way.
When we get really busy, and laundry is overwhelming, I will take some loads to a laudromat to get caught up. Usually I catch up by taking loads of towels and sheets and regular colors, etc to the laundromat. I always take my comforter to the laundromat to wash and dry. Everything else that is washable is done at home.
My DH has shrunk my clothing in the past, so I do all of the laundry. He gets on my case sometimes that he needs something, but for the most part, I keep up with his and all the family's laundry, because I live in fear that he will ruin a lot of me and my daughter's stuff, meaning that we will have to go shopping again. I kinda like laundry, since for years we didn't have a machine in our house. Going to the laundromat to catch up, or doing an occasional laundry marathon is a small price to pay for nice-looking clothes that last longer.