Best Sites to Find Rental Properties (in Maine)

[Joey Shaw]

What sites/resources does everyone use to find rental properties? I'm in Maine, hunting around the Augusta/Kennebec County area. It seems like 75% of what I have been looking at have been pending by the time I look at them (within a couple days of me finding them) and 100% of the ones worth putting an offer in have already been under contract within a matter of a couple days after I find them online. 

Any tips/tricks/suggestions for finding them quicker would be much appreciated.

I've been considering direct mail to possibly get some off-market interest, but that won't be for another couple of months, after my wife and I have our first kiddo.

Thanks in advance for any guidance!

- Joe