Best way to tone up?

Alright so I'm 21 years old, am 5'2 and weigh about 115 lbs. I feel that isn't bad for someone who had a baby almost 11 months ago. Now I'm putting this out there, I am not looking for ways to lose more weight. I am very happy with this, but I just really want to tone my body all over! I've been exercising on and off because I feel that everything I try isn't producing much of a result. I would really appreciate any advice! [:
Best way to tone up?
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