What did you do when your baby wanted to sit up all of the time?

My 4m old wants me to sit her up constantly & I just want 10 minutes to eat my lunch! I've tried pillows but then she finds her toes and it all goes down hill, lol. I really would like to avoid a Bumbo or something similar cause it's the one piece of gear that several pediatricians (including ours) & our chiropractor have told us to avoid...but sometimes I want to run out to buy one!