Tech: just like everyone else said Linux and/or *BSD. I personally use Linux Mint for basically, so I can play muh games through WINE easily, that said, it's also a good idea to try other distros too, to get a better understanding on Linux.
I started with Mint then installed Arch on a thumb drive to run on a laptop and then tried out FreeBSD on another laptop for a local ftp server. I'd really like to try Void or Slackware, probably on my desktop.
For a web browser, I'd go with Pale Moon with NoScript, RequestPolicy, Adblock Edge, Self-Destructing Cookies, and Better Privacy. Normally users say to use HTTPS Everywhere, but it's personally a pain in the neck for me, I should probably be using it though. I'm pretty positive Adblock Edge is kill, but I'm not sure of another alternative yet. I think users are using Ublock or something now? I'm not sure.
Try not purchase anything that's DRM. I normally torrent off of kat.cr, but try to donate to those small musicians if you can, that are on Bandcamp or something like that.
Try to stay away from smart phones if possible, if not put a new ROM on it. This is the one area I lack and wish could do better. It's just really convenient. I have disabled location services and Google programs, but I doubt that helps much. And use F-Droid, it's all open source apps.
Clothes: Hit up that thrift shop man. Cheap and if you are lucky, durable.
I've gotten a couple comfy Hawaiian shirts from there and I wear them all the time.
I've also found plenty of good gadgets, like keyboards or speakers, and older computer parts at thrift shops, don't be afraid to check 'em out.
Food: Again, farmers markets and growing your own. I've been thinking of growing hot peppers indoors with a glow lamp. Hopefully, I'll get to that project someday.
This is how I was going to grow them if anyone was curious, I think I just pulled it off of an instructable or something.
http://pastebin.com/QvBhFP9k
Personal products:
Um, not really sure what this means, but if your talking about hygiene then I guess you could make your own soap or whatever, but it's probably cheaper just to buy from the store. Try to help out those little guys if they're selling something that could be used daily.
For furniture or such, dumpster diving and thrift shop.
Transportation: Bike or walking if possible. You'll get a good workout in too. I have a beach cruiser similar to pic related if you were curious. Ehm, or Kalyx. B^)
Hopefully this helps.