For the majority it will be pretty much like the regular flu. You may be tested for it if you present the usual symptoms. There is no current vaccine, being worked on for this next flu season, but there is some thought that if you had the flu jab last year you may have some protection.
Most people fall ill, fever, chills, coughing, feeling poorly, treat themselves with rest, fluids, perhaps meds to feel better, and they get over it. Your gp may prescribe an antiviral medication that can help you feel better faster.
It is potentially most serious for those who already have a chronic illness....asthma for example. Certainly as with any flu, there can be complications so you would just watch for anything more than what you would normally expect....difficulty breathing, bluish fingers or lips, etc..
Best way to avoid it is to wash your hands frequently, use hand sanitiser when you can't wash, keep hands away from your eyes, nose, and mouth, and try to avoid exposure as much as possible to someone who does become ill. The usual things you would do to avoid getting sick from someone.
When you consider how many people die from complications each year from the regular flu, you will see that swine flu has not been as much of a problem as they thought it might be. It had the potential and of course was all over the media, just as SARS, avian flu, mad cow disease, necrotising fasciitis....all of which are still around, but are no longer in the headlines.
I would, however, be sure to get a flu jab next season.