1. plan your walk.
2. proper attire
3. pick a time for your walk
4. plan on walking at least twice a week, going up to five times per week, depending on several factors
5. get into routine
6. during your walks, squeeze & tense your butt cheeks together frequently for a count of ten or 10 steps
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http://www.wikihow.com/Tone-the-Butt-With-Walking