Do You Believe in Karma?

Well, I do.
I am try to be a good person around my friends/family and with the people I don't even know. I keep in very low key when I have no control over any situations that will upset me in normal circumstances.

For example, I have been designing my templates and sell them on eBay, and there is a contain individual who is going around every template designers auctions and copy their designs and styles and post them as her own, and also bad mouth other designers creations. Such individual who is also copy many of my designs/styles and post as her own. Her actions cost me many nights of frustrations. Finally I told myself why pay so much energy on something that I have no control over. What she done will eventually catch up with her.

In Buddhism we believed in cycle of life, what you did in this life will result in what will you be in your next life, and sometimes this "result" will catch up with you in your current life time instead of next.

In Buddhism, karma (Pāli kamma) is strictly distinguished from, meaning "fruit" or "result". Karma is categorized within the group or groups of cause (Pāli hetu) in the chain of cause and effect, where it comprises the elements of "volitional activities" (Pali sankhara) and "action" (Pali bhava). Any action is understood to create "seeds" in the mind that will sprout into the appropriate result (Pāli vipaka) when they meet with the right conditions. Most types of karmas, with good or bad results, will keep one within the wheel of (the Sanskrit and Pāli term for "continuous movement" or "continuous flowing" refers in Buddhism to the concept of a cycle of birth and consequent decay and death, in which all beings in the universe participate and which can only be escaped through enlightenment. Saṃsāra is associated with suffering and is generally considered the antithesis of nirvāṇa or nibbāna.); others will liberate one to nirvāna (is a word used by the Buddha to describe the perfect peace of the mind that is free from craving, anger and other afflictive states).

Buddhism relates karma directly to motives behind an action. Motivation usually makes the difference between "good" and "bad", but included in the motivation is also the aspect of ignorance; so a well-intended action from a deluded mind can easily be "bad" in the sense that it creates unpleasant results for the "actor".