How do I stay motivated for an exercise routine?

Snow-Wolf18
Lately, I'm been trying to get in better shape. I'm not really trying to lose weight but tone up. The problem is that I can't really commit to it. I stay on routine for a week, then get tired of it and stop. I just can't stay motivated enough to continue.

Does anyone have any advice?
Updates
+1 y
Thanks for your answers everybody! I really appreciate them all and I now have new hope of being able to finally commit to exercise. :)
How do I stay motivated for an exercise routine?
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