It will be quite challenging to keep up with the latest fashion trends as you get busy with a lot of things in life. The most important thing to do is have a personal style and express yourself. Go for stuff that makes you feel good. You do not have to think too hard and just go for what makes you smile and comfortable.
Little black dress
You still need that little black dress. Adjust the length and style according to your age, of course. It will be nice to have something just above the knee but you still need to look at the mirror and see what looks perfect on you. Your black dress, as it has always been, will be your foundation for very interesting pieces of accessories.
Have fun with accessories
Accessorizing is a great way to update your wardrobe. You can keep your classic clothes but do not forget to liven them up a little with your accessories. You can express your individuality through colors. Do not be afraid to experiment.
Emphasize your best assets
Make sure you dress to put the spotlight on your best assets. Downplay what you want to hide by wearing darker colors on those parts.
You need to have that balance. You cannot wear something for the young since that will only make you look older. You cannot dress too old or you will be frumpy. Mini-skirts are definitely out but something just above the knee will be safe. It will still make you look sexy without revealing too much flesh.