Start slow with credit...if you're talking about building your business, try financing a handheld or something small...something you could buy in cash or pay off in one shot if you had to. Pay on time, pay more than the minimum, and negotiate everything- all rates and terms are negotiable.
Once you pay it off, evaluate your needs, check your credit report and scores, and go from there. Use it wisely........you always want to have some cash and some credit available. Never max them both out at the same time.