Since I've been blogging I have taken a few trips by airplane each year. I never took the time to sign up for any one in particular frequent flier program because I wasn't sure which airline I would use the most.
Last year my travel schedule increased quite a bit so I finally decided to sign up for the one that I was flying the most (Delta). I was even able to request credit for a few recent trips. My points are racking up and I'm not doing anything out of the ordinary!
I plan to sign up for any airline's frequent flier rewards program no matter how little I may fly with them. It doesn't hurt to have an account!