Transitional words and phrases connect sentences and paragraphs to each other. Paragraph transitions suggest a particular relationship between one idea and the next. Within a paragraph, transitions provide coherence: a sense that the paragraph contains one main argument or idea. Between paragraphs, paragraph transitions help with the flow of writing from beginning to end, as well as the sense of the coherence of the whole essay. Transitional words and phrases often occur at the beginning of a sentence and, for more formal writing, transitional expressions are set off with a comma. Some transition words (for example, "too" or "as well") more often occur at the end or even in the middle of a sentence, however.
A Note About Formatting: Outlines usually follow a specific format using parallelism, Roman Numerals, upper case letters, and sometimes numbers to indicate ideas with different levels of importance. Unless your instructor is planning to collect and grade your outline based on proper formatting, try not to get too hung up on making sure that you're formatting each section properly. The important thing to remember is that the outline is meant to be a helpful organizational tool --compose your outline in such a way that it will be helpful to you !