Ties are sort of ebbing out of fashion the last 6 months or so. At the office I see a lot less ties than earlier in the year, if anyone cares about these trends. If you are going to wear a tie, get one that is good quality silk, dont get a blend with a print. I recommend canali, zegna, brooks brothers, hugo boss. Also, try it on and tie it with a half windsor, if you cant get the tail into the keeper the tie is too short.
Another thing that is "in" now is not wearing belts, and instead using those cinch pants on the inside. If you are slim and have good fitting clothes this can look great. If you wear a belt, make sure you get it sized properly, the buckle should rest in the middle hole of the belt, not on either end.