If you have a back, then you probably need a Deuter Futura 28.
This thing is the best small backpack you could possibly imagine. I'm on a year long trip around the world right now, and this is my sole piece of luggage.
What makes it great?
First, it's small enough to pass for a regular backpack, so it can be used around town or in the wilderness. It's not one of those huge bulky bags that hardcore campers wear. At the same time, it is built by a hardcore camping company.
The big feature is that it has a lightweight spring steel frame built in. This keeps the bag off your back, so your shirt doesn't get all sweaty and gross. This also distributes the weight properly to the hips, so it's very comfortable to carry around.
It has one large compartment that can be accessed from the top or bottom (VERY smart), or you can zip one zipper and convert it into two compartments.
It has a built in rainfly that zips out of the bottom. I would personally prefer that the whole bag is waterproof, but this is almost as good. That would be my only suggestion to Deuter to make this bag even better.
The bag has all of the other extras you'd expect from a high end backpack: adjustable straps with chest and waist belts, space for a hydration pack, a smaller front pocket with lanyard, and mesh side compartments for a water bottle or other gear.
At first glance you might overlook this bag. What makes this plain looking bag so great?
The problem with most carry on luggage is that it's too small for more than a weekend trip. If I'm spending $279 on a bag, I'd better be able to use it on long trips as well as short trips. The Switchback 22 gets around this issue by combining two bags. They took a suitcase that was the largest allowed by every airline, and then attached a good sized backpack to the front of it.
Lots of people get out of shape, don't think about it, and then one day hit rock bottom or have a realization and go crazy to get into shape.
I'm not sure that's the best way to go about it.
I was pretty significantly injured in March (described here), and my fitness probably hit a low point in May. Now it's interesting - I actually haven't been on any sort of hardcore program since then, but I see my fitness levels improving.
I started working in movement and motion into every day. I tried to go for a walk, at least 15 minutes but ideally an hour every single day. No matter how busy you are, you could find time to do this.
I multi-task the walk. At the very least, I listen to an audiobook. This seven hours of walking time each week means I get through lots of audiobooks, which is great. I'm learning every day.