We all do - but you're one step ahead of the game because you’re trying to do something about it! It's paid off too, because you absolutely can check-in online! Well that's providing you're not an infant (if you are, you're a genius!), child, passenger requiring special assistance or an unaccompanied minor. If that’s you, make sure you're at the airport an additional hour earlier than normally required to check-in, hopefully you'll skip the queue due to being early!
As for everyone else, you can use your Airline reference (see 'I'm leaving tomorrow and want to check that the flight is leaving as scheduled, how do I do this?' if you're unsure how to find this) and go to the Airline's website (Google it!) and select Online Check-in. Then follow the prompts and you’ll never wait in line again! At least... not an airport check-in counter line.