The first thing to know is that this WILL cost some money. Not much, probably about $150 total.
The first thing I bought is the Magic-flight Launch box. It's a small handheld vaporizer that will fit into your pocket. It uses rechargeable batteries that come with it, that you can charge using a wall jack. Takes 3 seconds to vaporize, it is an awesome device. Magic-Flight.com - Official Home of the Launch Box Vaporizer is the site. It costs roughly $110
The second thing I bought is the SmokeBuddy. It is very cheap, roughly $20. It is basically a sploof. Unlike the toilet-paper roll with dryer sheets method I was using before, this completely eliminate all exhale smell. It uses a carbon filter that absorbs everything. Use next to window.
Once you have that stuff, you're pretty much done. What I do is put a damp towel underneath my door. This is to ensure that if there is any excess smell what so ever (there will not be much), anybody outside your room will not smell a thing.
Go ahead and open as many windows as you have in your room, turn on the ceiling fan, and turn on a mobile fan. I don't mean a little 2 inch fan you get from six flags, I mean a medium size fan that you can plug into the wall but move around the room to ensure that everything in your room is getting flushed with fresh air.
Lastly, your stash. What I do is first start off with one bag of the bud. I take a normal sandwich bag and close the top almost all the way, but leave a small little hole where I can put my mouth. I then place my mouth on the hole and suck in as much air as I can. Then quickly close the hole. Hopefully there should not be any extra air in the bag. Next, get another bag and a bunch of dryer sheets. The amount depends on how much bud you have. Put the first bag inside the second bag, and add the dryer sheets to the second bag. Once again, remove all the air from that bag. Next get yet another bag and whatever else (different) type of thing that will smell nice. I use the deodorant stick that I pulled out of the plastic, that will work just fine. Do the exact same thing and remove the air.
Congrats, your stash is perfectly sealed. Next just find a good spot to hide it. I recommend either a desktop/server that will NOT be on ever, or the back of a playstation 2. If using a playstation 2 (FAT), you will notice that there is a small mesh on the front that lets you see through the stash spot. To avoid anybody from seeing it, I ripped a piece of paper and simply shoved it into the back of the ps2 against the mesh. That way if anybody happens to see your ps2, there is no way they will see a bag or anything. If you don't know hat I'm talking about, go look at a ps2. Then you will understand. Any other place in a closet that has many layers is great. The more layers, the more protection. Do the same with both the smokebuddy and the launch box.
That's it. I know it's not much of a tutorial but I would just like to let you guys know my experience in staying incognito, and how I keep everything hidden. Thanks, I hope I helped a few people