Using one of the connecting transition words is a good way to link one sentence with another. You can also use "since." Other good choices are "because," "moreover," "additionally," and "furthermore." Which one you use depends on the relationship between the two sentences. Here is an example:
I added blueberries to the top of the salad we are having for dinner. Since Danielle doesn't like blueberries, I made a small salad without them for her.
In this example, you could replace "since" with "because" for basically the same causal relationship. However, you could also use one of the other three words if you wanted to emphasize "I also did this other thing."