... in applications
Just a little tip that you should always have a checklist, or a timeline, or a schedule - be it in school, work, or holiday even (unless you're in those tour-group holiday things).
For example, in university applications. There are a ton of new things you have to prepare for the school. And that's only in the applications phase. There is still the acceptance/matriculation phase after, which has all the nitty gritty little things - which are even more likely to be looked over if you're not careful to note down each step you need to do.
Every step matters a lot, from giving you your school network account (the must have in order to even school. no account, what work), to even applying for the tuition grant. (if you can pay less, of course you pay less.).
ASK. Always ask if you are not sure. Some times there may be odd phrasings that do not really makes crystal sense to you - ask first. Email. Or call up if you want to. All universities will have various hotlines up for various issues.
Job applications.
Always remember first and foremost, relate it to the specific job. It's good that you already have one nice and spanky new resume - first step done. But if you look at one job and realise its specific needs make some of your information extra unrelated words - cut them down. Too much unrelated information will make employers uninterested. (Or become additional fodder for them to put you in a spot.)("How do you think this XXXX will help you?")
Prepare the necessary hard copies of things you may have sent the company via email. Prepare even your ID picture if neccessary.
What is needed - that's what you should take note of.
Maybe they require you to do a feedback after the interview - remember to do it within 24 hours.
In any case - always be active and take initiative. Don't be afraid of seeming a fool (unless you ask if the Earth is round).
Cheers
J