Oh hey, this is something I'm knowledgeable about. I raised our AAR from 45% to 57% single-handey in a month (or at least that's what my ETL said). So, I think I'm qualified to give you some tips. And, not to worry you, but if your AAR doesn't increase, you will be moved from electronics. I've seen it happen and I've heard about it happening tons of times in my store. Maybe your store is different. Hopefully it's different.
The best way to get attachments is to ask. You can't wait on the guest to say they need something else because the chances of them realizing they need an attachment with their item on their own is slim. The best way to ask is to just smile and say "is there anything else you need with your ____? How about a _____ or a ________?" Works like a charm. Especially if you're a "cute young thing" as I've been called a time or two.
Real sale I had yesterday morning:
Me: "Can I help you find something?"
G: "Yeah, I'm interested in a 3DsXL, can you show me where those are?"
Me:"Yeah, just follow me!" "Currently our 3DsXL is $199.99, because it's brand new--it's the newest DS, it actually came out a few weeks ago--so it's a wanted item."
G: "Oh, I know that, you're the 3rd store in the area I've tried, and I'm glad you actually have some in red."
Me: "Lots of people are going out of town for Labor Day, I guess they're trying to get the kids something to entertain them for the car ride.
G: "That's what I'm trying to get one for. Do all the DS games work on them?"
Me: "Yep! But they all won't be in 3D, only ones that are specifically made for the 3Ds will be in 3D."
G: "Well hell, here I was going to buy you out of games. Go ahead and get two out, one in each color."
Me: "You're going out of town for the holiday, right? You might want to invest in a car charger."
G: "I never thought of that. Also, can I get that new Super Mario Bros game, and the new Kingdom Hearts game?"
Me: "Good choices! Also, since both of your games are over $34.99, this week we have an offer, where if you reserve a game for a dollar, you get a 10 dollar gift card. You spend 2 extra to get 18."
G: "Well hell! I'll get this one and this one. You can't beat that."
Me: "Nope, you simply can't. Might I suggest a replacement plan for the 3DSs? This is the one you'd get if you intend to purchase, it covers everything in the box, and up to five games. "
G: *ponders for a bit* Yeah, I think I'll do that.
And, that's how it usually goes. 2 3DsXLs with 2 attachments (4, if you count the reservation cards) and 2 esps.
The hardest thing you're going to have trouble getting attachments with are GPSs. They come with mounts and most come with unlimited map updates, so there's no need for a subscription. The easiest are gaming consoles because, unless they are just replacing an old one, they're going to want to get games. Or an extra controller. Or headset. Games count with laptops, too.
If they're buying an iPod, be frank and tell them that they're slippery and they drop a lot. Also tell them the headphones suck.
For TVs, let them know the speakers suck and it's best to invest in a sound bar. Buying a prepaid phone? You'd be a fool to not get a phone card.
It's all about knowing the product your selling and know what attachments you have in stock for that item.
Good luck!