As mentioned in a few recent posts, this is something that I definitely need to work on. However, it's also something that I need to learn how to work on.
I'm sure that most people who are strong in the opening have a system that they use to learn openings relatively quickly and efficiently. I am not one of them. For me the opening is something of a struggle to learn. Oh sure, I can learn the first 8-10 moves of some common lines relatively easily, i.e. the KID Bayonet Attack or the Yugoslav Attack against the Dragon, etc.
But those are fairly simple lines that don't tend to deviate too much prior to move 11-12, so that's easy.
When I sit down to work on the Italian, for example, it's a whole different story. There are a relatively larger number of branches that begin earlier, which makes for a different experience.
I haven't quite found a technique that I like to assist with memorizing the lines I need to know and then to be able to work on understanding them once I have them memorized...
So I need to spend some time and develop the proper approach. I'm sure that the payoff will be worth it.