I have a 15-month-old son. I'm a first-time mom and had a lot to learn when my son was born. Here's my suggestion for dealing with stinky diapers...
If you aren't in an area where you can dispose of your bags of garbage every day or so (as I'm not - we live in the middle of nowhere), this is so insanely simple. Buy the large Ziploc (or storebrand - doesn't matter which) gallon-sized freezer bags. Each time you change your baby's diaper, put the dirty diaper in the Ziploc bag, squish out all the air you can, and seal it up. You won't have any trouble with odor. Much better than wrangling with diaper genies or any such stuff as that.
Also, a good nausea/morning sickness tip that I share with everyone I can...try grapes! If you're feeling queasy, eat a handful of grapes. It doesn't even matter what kind of grapes they are. A nurse at my OB/GYN's office suggested this to me, and I swear it works! Your nausea will be gone in less than 10 minutes! I had some lousy morning sickness when I was pregnant, and eating grapes got me through it with flying colors!