So I decided to try an old trick I had heard about ages ago, but never got around to trying - curling my lashes with a spoon. Turns out, it works amazingly well! I find it also creates a much more natural curl and flutter than an eyelash curler, which sometimes creates too uniform a curl across the entire eyelid. It does take a few tries before you get the hang of it though, so just try to be patient.
What you do is hold the edge of a spoon against the base of your eyelashes, the interior of the curve facing outwards. With a light finger, press your eyelashes against the edge the spoon, then gently, but firmly (if that makes sense) slide the spoon outwards against your finger. After a couple of pulls your eyelashes should be nicely curled.
I actually find it's easier when I turn my head so I can see my profile in the mirror while I'm doing this.
The downside to this method is that it's probably easier for those with longer lashes. It's not impossible for those with shorter lashes, but it might just take a little more patience and time. The upside is that you never have to worry if you are traveling and forget your curler, just ask for a spoon.