There is no easy way.
Is what I did with my chinchilla, is I fed her a treat every time I had to pick her up. It was only for like a week or two, but after the first week she was literally jumping into my arms. Though this didn't stop her from squirming it did make picking her up a lot easier.
Before I started giving my chin eye drops, I asked my vet if it was okay to give her two at once, which she said was okay. This was very important in the whole thing because there was a lot of times where I wasn't quite sure I got it in.
Really it was a lot of trail and error. I think I found in the end not getting the eye drop too close to the eye was key. Also make sure you have the eyedropper ready before you start.