Whether it is a blogspot blogging or wordpress or any other blog domains, here are few ideas and tips:

Verb: coachthecoachblog, transformlifeblog

Adjective: superlifecoach, effectivelifecoachblog

Noun:changecoachblog, emotionalintelligenceblog,

Number:Gr8lifecoach, email2lifecoachblog

Sentence: comeexperiencelifeblog, whatalifecoachblog