If you can afford it, buy yourself a copy of Quickbooks, much better all in one system account managment, quotes, invoices etc. Its what you want to be looking at if your really serious. Excel is OK, but I wouldent trust it with my accounts.
If yu've very simple accounts I'd be tempted to get a basic 'double entry' accounts book from the stationers.
Not high tech but very flexible!
And if you do decide to go for an accounts system later you'll be able to use the headings in the ledgers when you set teh accounts package up.
Joe
__________________ "I shall not commit the fashionable stupidity of regarding everything I cannot explain as a fraud." - CG Jung
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