Completely agree with pi and Hancock. It is definitely important to save up and not overspend, but I think the tips you've talked about are over the top... technically speaking, you've got to spend money in order to make money. A few things...
If you're saving all your money, how come you are still leeching off parents and friends...?
This is probably getting a bit excessive - yes we all try to manage our spending and 'budgets', but being absolutely precise to the coin and the 5 cent is just crazily excessive I think... Most people these days use cards anyway.
This is a good tip!
This is getting too serious now lol.
Don't you feel awkward having Shapes, chips and a free water while everyone else is having normal food... :/
Isn't this time consuming???
Surely you spend SOMETHING?!!
I wouldn't go to this extent to save money... It's just a classic case of being cheap rather than saving money. I personally never buy the clearance items etc cause it's clearance for a reason!
What exactly are you saving up for lol?
This is just sad...
Surely you buy something? Or pay for SOMETHING??? Shopping doesn't become debting unless you have a credit card, and the majority of people our age don't have credit cards. You can only spend what you have.
But I thought you don't do shopping...
I'm pretty sure everyone here would agree that you can only borrow and use family members' cars for so long. Car usage is one thing you can't leech forever. You'll eventually need to get your own car, and by eventually, I mean only a matter of months. I'd be surprised if you can last longer than that. I'm getting my first car next month and I'm more than capable of managing my money etc... car is $20k and I am more than aware of the added fees and ongoing costs. It's just something that has to be done considering my distance from uni... If you're complaining about a car that is $2k you must be a real cheapo haha.
Can't judge people on those 3 things though...
Overall I think you might need to evaluate exactly why you're saving, how you're saving and how you're (generally) going about life. Spend your money, have a bit of fun and don't have the whole 'I want to save up for my house deposit' so early on in the game. I'm sure you will have plenty of opportunities to save in coming years. If you're this cheap with an OK part time wage as a student right now, imagine how you'll be when you work full time! Like I said, saving is good and a must, but don't go to crazy lengths to do so. I don't know, this is quite a sensitive topic and I think that it's important you don't get bogged down in the 'I can't spend a cent' mentality you've got going. The way I see it, it's quite selfish to do all these things to parents, friends, store managers, companies etc for your own personal savings balance... 
But you need to spend money
on the right things in order to make money. I've spent money to make money and I've saved money to save money.
In response to all of your responses;
#1 - because the objective is to continually save. Don't settle for $x, you wan't to save as much as you possibly can.
#2 - it isn't obsessive though, it's a good idea. Just be aware of situations when you'll be receiving a lot of coins back, you'll be surprised how much it helps. I can't be thankful enough to my mind for considering it.
#3 - thanks
#4 - Not really. It helps you eliminate poor spending habit. I'm sure a lot of people can agree with me here.
#5 - Normal food, like? I'd consider McDonalds abnormal, now that I've had experience working there. I'll never touch it again. Even though shapes/chips are somewhat processed I guess, McDonalds is completely processed food, I don't consider it normal. And nope, I don't think there is anything wrong with it. Save yourself $5 a few times a year.
#6 - Not really. Just a few calls and emails.
#8 - Nope. In year 10 when I went out quite frequently, I'd go to the mall with $30 and always come home with $25+. I still follow this idea.
#9 - It's clearance for a reason, the reason to reduce stock in order to make way for new stock or that it's been slightly damaged usually. I don't see a problem with this.
#10 - Emergencies, home loan down payment.
#11- You could say so and it probably is my most 'saddest' point out of the ones in my OP. Use it however you like or neglect the idea, my parents are happy to give me food. I don't obnoxiously pig out once a day and demand food, it's more of like requesting lunch and dinner at home. There should be no issue with this at home since your parents are your caretakers and it's completely normal for them to take care of you.
#12 - Nope. When I go to the shops with any family members, usually I either get a snackbox from McDonalds and a water or I go to Coles and spend a few bucks.
#15 - When you're forced to buy something you want the cheapest way out. Some items are unavoidable, for example I need to buy a laptop soon for Uni (for an I.T course) so I'll be spending a long time bargain hunting in order to get the best deal. This is simply an unavoidable cost as a laptop is pretty much mandatory.
#18 - Suit yourself. I don't think a person needs a car unless they must travel somewhere regularly. Yes I don't think $2k is reasonable for a car, I simply don't want to fork out that much. It's $2000, two thousand dollars. Some people spend weeks trying to earn that.
#19 - I don't know what you mean here sorry
Thanks. It's more of a habit though. I don't think I'm doing it just to please my selfishness. I'm just actually amazed at how much people can spend. After lightly saving money for a bit I've really gotten into the act of saving. I just want enough money as I can get in order to fund myself when I need money most. I see your viewpoint though.