Wear the clothes, don't let them wear you. You're tall, so shop for clothes that are made for tall men.
Don't buy average sized clothes in a larger size - the look becomes sloppy.
If you're "short waisted" (your torso appears too short compared to the length of your legs), wear
sweaters or sweatshirts that do not have a waist cuff. This will create balance between your torso and legs.
Layer your shirts. A solid color long sleeve tee under a graphic tee is still a big trend.