Your husband will come out to fix your flats? That's so cool.

As with all of the above comments, nothing beats experience. Learn it before you need it. I was fortunate that my first several flats were slow and didn't flat out until after I was home.

I also carry a sharpie and make a reference mark on the tire and tube. Later when I'm home I can search for the puncture and then match it up on the tire. I once got a slash in the tire that I couldn't see with the tire deflated. Once the tire inflated, the tube poked through the slash. I didn't see it. Thankfully I was on my trainer when it blew and not on the road.

Here's a visual guide to tube changing
http://www.chainreaction.com/flattirerepair.htm