Just because you cannot attend the fashion runway shows doesn't mean that you can't get the 411 on all the latest fashion trends.
Take a look at the Style Network and find out about their top designer's and what they bring out for people to wear each season. Go to the store and take a look at several fashion magazines. They will have a place for you to subscribe in which you can then always be "in the know" in regards to fashion highlights.
Always know your body type and how to complement it. Everything that looks great on a fashion model doesn't mean it will translate to greatness on you. If you know what looks good on you and what doesn't, you shouldn't have a problem with keeping up with the latest.
Always be on the look out for different variations of what's popular. You may not like the design or colors of the latest spring dresses, but you can opt to choose something else that looks like it, but in a different color. Also, most high-end fashion designs will be priced way too much; an alternate or substitute style can always come in handy.
Trends quickly change, so when you figure out today's trend and get the accessories to go with it, tomorrow will be something new. Be realistic and know that you won't be able to follow along with every single trend unless you have the unlimited cash flow to do so. Learn to mix and match with different trends from the year before.
Use common sense. If the trend is to wear a specific type of high heel shoe and you have to walk 3 miles to work, you may want to try the latest fitness shoe or a pair of fur lined boots.