On my IAD-LGA this morning, I had to "late check" a bag. I was told this means it may or may not be at LGA when I arrive. Worst case, they said, I will need to go back to LGA after the next flight lands around 4pm.

My 8am is about to leave. When I get to LGA what are some best practices in this case? Best way to find out if my bag made it on my flight, etc.

Also, besides getting to the airport earlier should I have done anything different?