Allison, reality is that people skimp on prep work all the time. Sometimes they get away with it, sometimes things go wrong. Things like the 6 step tutorial help you cover the bases to help prevent anything going wrong, but only you can judge if you don't feel you need to degrease or if you'll be happy with the finish if you don't sand between coats. You wouldn't be the first...just weigh the options knowing that you're taking a chance and make the judgement call accordingly. Actually, the tutorial mentions that both degreasing and sanding between coats may be optional depending on your situation. It's always a good idea to degloss paint sheen before painting to give the paint a surface it can bond to...but I recently learned my parents have never sanded their semi-gloss banister before repainting. Advisable? No. But they seem to get away with it.

Have you seen the Rustoleum Cabinet Tranformations? The big bragging point with their product is no priming or sanding; you use a deglosser instead of sanding, a "bond coat" instead of priming, and the glaze and top coat for the finish coats; things you can do on your own with products of your choosing, but they've found a catchy way to market it as a package.

Essentially you need to:
Clean (Michael's tips are ideal, but perhaps you could get away with less)
Degloss (sanding; deglosser; or deglossing cleaner rinsed super, super thoroughly)
Paint (ideally priming 1st, at least on top, since it could help keep the darker colors from bleeding through to the white...you may not need primer to do gray on the bottom, unless you're using a latex over oil)

If you're not changing hardware or filling holes you're saved a lot of work. I think the tutorial can look intimidating...but it's really not that bad.

Thank you for your time. I realize the doors will have to be sanding and did consider primer for cover on the lighter cabs. I have not seen the Rustoleum Cabinet Transformations but will check it out. Baby due this next week, so we won't be repainting for awhile longer.

don't forget , after sanding wipe down with damp rag ( paper towels in a color other than the color of paint you are sanding would be I deal , I use a spray bottle to lightly mist the surface then wipe off . Change towels often to be sure you get all the dust off. This is probably the the single biggest thing you can do to prevent chipping I have seen chipping on some jobs because of this (not mine of course) . Its so much work but must be done don't even thing about doing this if you don't have 2 weeks, a thousand dollar sprayer, a 2 car garage for spraying , racks for racking the doors and drawers, and at least 3 to 4 coats per side