Rule 3: You want to stress, then pause, stress, then pause.  

Pausing gives your listener time to fully hear what you say. This is a standard strategy for speaking clearly. You will not sound natural if you speak so quickly that people cannot register your words. Also, you will be less able to hear yourself. This may cause you to have continued problems with important sounds, like R, L, TH or the vowels.

Pause before or after a stressed word. Also pause before connecting words like "and," "or," "but," "that," "which" and others. You can pause before prepositions as well. Grammatically a preposition begins a prepositional phrase, a separate thought or idea. Stress the noun in the phrase and say the preposition lightly. As before, the slash (/) indicates a pause.