I didn't think to add the obvious. If you have a lap top and can type fast, you don't need to use pen and physical forms, but typing on a laptop seems more awkward when interviewing relatives.
Also, family tree software makes recording and organizing so much easier. It's good to have all your information stored on software rather than depend on internet sites only. That way, no matter what happens, you have a backup copy. Familysearch.org offers free genealogy software if you're not already using something else.