Upward intonation places emphasis. On the whole, women enunciate much more clearly and precisely than men. Do not 'swallow' pronouns, articles or other 'little words' at the beginning or end of sentences. Women usually start a sentence more softly. Women tend to concentrate more on thoughts and feelings, while men concentrate on objects and actions.
Men generally use more 'short cuts', colloquialisms and bad language, too.
A simple illustration is to imagine someone asking a friend if they are going to go for a drink after work. Use plenty of air to get a breathy sound. Women gain loudness by using the cavities inside the head as a 'sounding box' whereas men use the chest. Record samples of your voice and listen to yourself. Read a passage of text, listen to yourself and keep practicing.