As most vegans already know, animal-free alternatives to many of the items listed off can be found quite easily (e.g. shampoo, vitamins, cosmetics, deodorant, detergents, candles, candy, fertilizer, pasta, cake mixes, et al.) and many are just altogether easily avoidable (e.g. anti-aging cream, matches, et al.). It may not always make life convenient to look for alternatives or to refrain from using certain products, but veganism isn't about doing what's convenient for us. Veganism is about not using non-human animals as things that exist for our convenience.
In cases where animal-free versions of certain products cannot be found and where the use of such products is unavoidable and necessary (e.g. certain medicines), then we all do what we need to do to stay healthy and alive. It's important to remember that with certain medications contain animal products used as fillers or inactive ingredients (e.g. gelatin capsules) that it is entirely possible to seek out and find versions that do not contain any by simply sourcing the medication from a compounding pharmacy. This should always be explored and chosen if it's an option. On the other hand, there are cases where a medication's active ingredients are animal-derived and where the use of this medication is required. In those cases, such use may not feel "right", but it can certainly be excusable (and even justifiable). I have as much interest in continuing my life as any other human or non-human animal, no?
That this is so by no means entails that "some use" of non-human animals can always be excused or justified, of course. Context is everything. Is it possible in this overwhelmingly speciesist world to live a life that is 100% free of the use of animal products? Of course not. Does this mean that it's OK to sneak in the occasional chicken wing for kicks and still call yourself a vegan? Again, of course not. But veganism is a lifestyle that's the hands-on application of an ethical framework where every single day you need to inform yourself so that you can assess situations and make the proper choices. Some of those choices we make as vegans when it comes to our own self-preservation end up being very personal ones, but those decisions we take and those choices we make need to be taken and made in good faith.
To learn more about going vegan and about the abolitionist approach to animal rights, check out the Animal Rights: The Abolitionist Approach website and stop by its brand new discussion forum.
(Note: Edited to clarify a few potentially confusing points.)