Despite living at my parents house I do take care of all the chores (for myself) you wrote down, so in a sense I do think I can reply. However; I think my list pretty works if you're on your own but would probably be terrible if you share a household (and these people depend on you)
- do you have a specific schedule that you follow?
Nope
- do you have a list?
Nope
- do you make a list every day, every week etc?
Nope. The only type of list I do sometimes make is when I need to go places that are incidental (say, a doctors visit) but not for groceries. I tend to memorize really well what ran out (unless someone else in the house used it and made a jar empty or anything; doesn't happen that often though). Sometimes I just make a rundown through the house and check the cabinets and the fridge to see what's out and what I need to bring.
- how do you decide what to eat for breakfast, dinner, lunch snacks?
I decide by looking what's there... sometimes I end up making a run to the store to get something or skip a meal altogether. I don't really have this idea of what I want to eat way ahead of time. Food for me often is just a way to put some reserves in my body so I can go on with my day (which sometimes also means I'll eat energy bars and such rather than full meals). A limited budget probably limits choices as well, so I tend to finish packages one at a time rather than being able to choose.
- do you decide in advance what you going to eat or you just "go with a flow"
I don't decide in advance. Most of the time I'll head for the store and just grab stuff that's on sale (and of which I know that I'll like it and know how to prepare). Stuff that's on sale because it's nearing expiration date is pretty much how I save my money on food (and considering it's less than a 10 minute walk it's really not a hassle). Usually I'll try to bring home stuff for 2 days so I don't have to make a run daily though. If nothing is on sale... I'll end up grabbing stuff that's cheap overall. It's the moments I just happen to have a bit less choice for dinner.
- how many times a week do you go grocery shopping
In general it depends; I can go from every other day to maybe twice a week or sometimes even once a week. It might depend a bit on how much stuff I'm hauling home (or feel like hauling home). No car kinda makes you try to shop and travel lightly in that regard I guess.
- how frequently do you clean and/or organize your house?
That might be one I can't comment on much considering I live at my parents house, but; I clean when it's a mess. And honestly, that is more often than my parents touch a vacuum, lol. I have no real schedule for it, but usually if people are coming over I might take a broom, or vacuum, dust off a bit, maybe do dishes and make sure I've got clean plates and stuff like that.
- how frequently do you do your laundry?
Again; when I need to. I rarely run out of clean stuff, so it would seem my schedule works for me. But I do have my days where I don't even bother getting dressed and have my "PJ's" on for a day. Those often tend to be days where laundry can be done best, since I'm not wearing anything and my entire wardrobe gets a "reset" in terms of cleaning (well, except for PJ's, lol)
- do you have a system that you follow when it comes to taking care of yourself and/or your family?
Nope, none at all. The best system for me is no system and doing stuff on a whim. That's kinda how it always was and I was raised I guess. Though I'm seeing that if you don't have a bit of discipline and be able to get up and actually do stuff, chores don't get done. That is seemingly a harder and harder task for the other people in the house (read; my parents). It seems my girlfriend tried a similar approach when she was housesitting for her brother... the result; she didn't eat properly for a bit (at least, that's what she told me); so its not for everyone.
My "system" (or lack thereof) seems to work fine for me, but then again; no job might probably allow for a schedule like this whenever I feel like it. I remember when I had a job, even planning groceries was way to stressful for me. I want to go out and do things when I want, not when time dictates my life. But that's a different topic, heh.
I think it also works fine for anyone who lives alone, can motivate him/herself and lives closeby a grocerystore (or has means to get there easily and fast) and perhaps has a pretty liberal timetable in life, generally speaking.
Adding in other people and/or obligations kinda limits how you can go through life like a unguided projectile since they will pose roadblocks for many things (and with that I mean it in the least problematic way possible).