Commercial mosquito repellant usually works pretty well. Citronellla oil is good but stinky. I've never heard of neem oil being used for the purpose
-- it's used for skin care, not as an insect repellant.
Smoke helps, but then you have to breathe it too. Here and in South India some folk carry a pan of smouldering camphor through the house just after
sunset, smoking mosquitoes out of every room. This usually keeps things under control till bedtime, when one retires under a mosquito net or a fast
ceiling fan that makes it too windy for them to fly about. Others may use mosquito coils (which give off insecticide-charged smoke), or the more
modern vapourizers. But these don't really work. I recently watched a mosquito land on a vapourizer without suffering any apparent ill effects.
Poison... any lethal poison is guaranteed to keep Mosquitoes, and any other Earthly annoyance, away.
If someone has a surefire method that doesn't kill us, though, I am all ears. Those little droning devils feast on me before all others... an honor
I'd quickly give up.