Using it through the season
Keep one list for the whole season and set its date to the day you start. Birds you tick for the first time are marked New, which makes first arrivals easy to spot. For the full list where you live, load your state from the Edit list tab.
Live migration
For nightly migration forecasts and radar, BirdCast from the Cornell Lab of Ornithology is the source to use. This list is for what you see and hear on the ground.