Question

ways to start a conclusion

Answer 1

basically just summarize what you talked about in your introduction/body paragraphs. then you can establish what you learned/concluded about your research or whatever it is that you're talking about

Answer 2

Welcome to Openstudy!
You can always start a conclusion with "Ultimately" or "In conclusion." You can then, as blurbendy has said above, summarize what you have written in either the introduction or your body paragraphs.