Research and think carefully about the structure you want to choose for your company. Depending where you are at, you'll have the option to incorporate as a separate entity; form a partnership; or go it as a sole proprietor. You may want to see an experienced accountant to consult with you on the best most practical setup.
Next, inevitably, you'll want to grow your fundamental knowledge in accounting, bookkeeping, and your country's tax laws. You'll want to keep detailed info on all your transactions and eventually improve & implement procedures to organize & monitor this data effectively (as Joel suggested, Freshbooks.com is a good start).
Regardless of whether you 'enjoy' accounting, bookkeeping, and tax - this is a vital aspect of your business; and can make up for the largest chunk of your total business expenses so you better had manage it well. And it's much easier if you're organized from the start.
From there it's all about creating value for your clients and marketing yourself to new ones. Goodluck.