Melafix, Pimafix and Aquarium Salt. If you have easy access to all these medications and more, I wouldn't go to overboard though, it's great to have the basics but you don't want to waste your money on something you will never use or goes off before you use it. So pick the stuff that can treat a wide variety or common diseases.

Medicated fish food, I'm using Jungle brand antibiotic pellets and Tailer loves 'em the crunching sound he makes when eating them is quite loud 
Kordon rid ich (sp?) is good too. Agreed about this being a good candidate for a sticky - nice one Teetsy Christmas karma for you.

I just have salt and Epsom salt, it's all I need I also happen to have medicated food and furanol 2 (antibiotic) since the last sick-fish adventure

But I'd say only salts and medicated foods, for various reasons. It's usually not very hard to get some anti-bacterial, -fungal or -parasitic medication whenever it's actually needed

I live pretty close to my shop Which is why I strongly advice that people don't get too big loads of meds, as they lose their strength.

Salt and the like should help halt the illness until you get the stronger meds as required.
However, I don't think methylene blue and other chemicals would deteriorate the way "mixed" medications do. so I guess (if I could) I'd have that around too Personally, I'll work with the more preventive technique

Never said anything else
I completely understand her keeping everything in stock, because I have lived all my life far away from any shops, so we used to stock up everything once a week/two weeks.

It's really a personal choice.
I just feel better and more secure by having it at hand.
I would go crazy if today or on another holiday when everything is closed and then tomorrow too, my fish got sick and I would have to wait until Monday to treat my fish with the proper medication.

But that is true...as long as the medicine is still sealed it should be fine to use...but I would throw the rest out after using it if some is left.

I prefer to wait because I really don't have the money to be wasting it on something I am never going to use and/or goes off. I live like 20 minutes-half an hour away from the shop so it's no worries to get there, plus when I'm going to university I am heading that way anyway so I could just drop in there before or after I get on the train.

I have spent so much money on all the medication I brought for Sunshine the past few weeks and of course I would do anything for Sunshine, but I didn't even use some of them and others didn't work  So I definitely agree with Nossie.

Everybody already agreed to that Which is what the forum is for, personal opinions and that only.

Well, than we should leave it at this instead of draging on and on, lol 

Anyways!   What I did was, I bought an extra $3 tub at walmart and now put all my medicinal items to treat the fish in it, and then it is tucked away in a cupboard part of a fish stand.  That way if someone gets sick, I have all my medications and salt in one place and can find it easily.   I think that's important too especially if you have more than one tank and stands.  I use to tuck a few things here and there but this is more organized and I feel even better.  It's stressful enough when a fish gets sick and then to have to search for the medication you want to use..."now which stand cupboard did I put that"....is not fun to play! LOL!
Um yeah, but I have currently have 6 tanks running plus the baby tub.   I also put all the baby food/fry food in a little plastic container so I have it all on hand for next time