OS X :: Wiping Personal Data On Macbook But Leaving Apps?

I am selling my Macbook Pro and need to wipe all my personal data off of it. I gave the guy buying it the option of me cleaning it out and leaving the applications and essentials on it or just putting in my install disk and wiping it all together. I was wondering if there was a simple way to ensure that my data is off of it (I've done tax returns on it, personal photos, etc...) without clearing data he is just going to have to put right back on it (Firefox, Photoshop, etc...)I thought I could create a new admin account and delete my user account but I just want to be sure that is enough and I couldn't find a solid answer searching the forums. This is the first time I've had to create a new post and haven't just found it by searching, I know how much we all hate repetitive threads.