V neck is the best cut for tops. It will make the illusion of a longer torso, the lower the cut the longer it look, but as always be careful to not go too low.
During the rest of the hot months, a halter dress or top is best.
When wearing prints make sure to balance it. If you were a print skirt make sure to wear a none print top and if you are wearing a dress with a loud print add a blazer.
For bottom, A line is best because it will define the waist and elongate the mid section.