I just sit on the floor with him 

We do a few episodes of propped sitting each day. I sit him up and make his hands a tripod and let him sit up ( with my hands nearby to prevent faceplants when he gets tired). He's slowly getting stronger-just like we did with tummy time. He hates it at first but is getting better with it.

I put my LO in between my legs with some toys and kind of create a barrier. This picture is recent so I've been giving him more space, but in the beginning I made sure that he was more supported. He also loves it when I prop him in the Boppy and put a pillow in front so he can't fall forward. I think that you could create a similar effect using 4 pillows if you don't have a Boppy. I do it on my bed so I can fold laundry, but it would work on the floor, too.

I just sit him in between my legs and try to keep him engaged with a toy or music in front of him. He doesn't complain about it much but it makes me nervous to keep him sitting *more like hunching* down like that for too long though. I feel like his back hurt and it gets hard for him to breathe cause he's so bent forward. We have the bumbo and the fisher price sit me up chair--we alternate between all three options to practice sitting up