I'm a 32F. It really depends on what your goal is, do you want to minimize your bust? Do you want to emphasize it? Do you want to avoid looking top heavy?
I don't find my bust a problem when I dress. I don't know. I guess I'm used to it, I think almost everybody has some kind of challenge when it comes to dressing themselves.
A basic rule, though, is fitting. You have to have a good bra and you should only use clothes that fit you right. You probably know that. Also, consider tailoring.
I wear almost any type of top, really. I'm in my 20's and I like to try different styles. Some make my bust look smaller and some bigger and neither is a problem to me. I do play up the proportions of the whole outfit to avoid looking top heavy. That is a look that I don't like.
For example, if I'm wearing a fitted blouse that emphasize the bust, I wear something more voluminous on bottom to balance it out. You definitely can wear boxy shapes but pay attention to the fabric, if it's light and drapes it would be flattering. If the fabric is really thick it is going to make you look boxy. I don't know which look you want to go for, maybe you want to achieve a more androgynous look or the bombshell look, most fashion advice for a big bust tells you how to minimize it in order to look more like an hourglass figure but who says that's what everyone wants?
So I recommend you thinking on which look you want to achieve, what parts of your body you want to emphasize/demphasize instead of thinking "how to dress your bust". What do you want?