What is your background?

I recommend LinkedIn. Create a nice professional profile and start building contacts. Start with friends and current coworkers, it will then search their contacts for other people you might know. Build to old colleagues, classmates, etc. Inevitably, someone from your past (old CFI, colleague, etc) will pop up and you might have flown with them and they are now at UAL or DAL. On the other hand, don't blindly ask people you don't really know for a rec. make it legit.