Once you research the data on what people actually search for and buy, then you can work on optimizing title tags. Remember to list the most important key phrases in the beginning of the string when writing title tags. Put your main key phrase at the start of the title. Try and fit in a longer variation in the title with more keywords, and use a non alphanumeric character between your main key phrase and before your longer variation to break them up. You can use anything such as a pipe, hyphen, colon or an arrow.