Your use of commas is fine in the five numbered examples you presented, and your career counselor offered you confusing advice about punctuation (even though she may be outstanding at career counseling in general).
In terms of substance, excellent computer skills involve a lot more than typing speed, which is a relatively small part of computer literacy. Far more important is your familiarity with Microsoft Office programs, including Word and Excel, and especially any proprietary or specialized software specific to the industry in which you seek employment.
Speaking strictly for myself, as an employer I am put off by an applicant who thinks it is important to mention his or her typing speed in a cover letter. There are exceptions, of course. If it has been your life-long dream to become a medical transcriptionist, for instance, then it would be very important to highlight that ability, along with an outstanding medical vocabulary, excellent editing skills, and exceptionally good comprehension of spoken English. Otherwise, it just sounds like you are bragging. Please keep in mind that the person who reviews your application probably types at 40 wpm or less. As a Stanford graduate, you hopefully will not spend eight or more hours a day speed-keyboarding, which is extremely tedious and stressful work.
If you want to keep it in, then I would recommend, "I have excellent computer skills and a typing speed of 80 WPM. I'm fluent in [...] Microsoft Word and Excel, as well as [...] Adobe Photoshop and other imaging software" (or CAD/CAM applications, GIS software, or other specialized programs in math, physics, design, layout or whatever else may be required for the job). Under no circumstances should you write, "and therefore I deserve..." anything! An entire generation of students raised with the fantasy that everyone should have high self-esteem (rather than "accurate self-knowledge") has created a false sense of entitlement that clashes with the reality of working in the real world.
The key is always to write for your reader, not for yourself. Put yourself in the employer's position, and ask yourself what you would want a highly qualified applicant to say about herself in her cover letter. Try to avoid cliches and be honest and direct about your experience, education and accomplishments. You'll find that it results in far more positive responses from your prospective employers.
Good luck, and don't worry about your use of commas. You've got it!
The major difference between the predicates distinguished here with Wh-clause complements is that
- not know belongs to a class of predicates that takes a Disjunctive Wh-clause complement
whereas
- not care (in the US) belongs to a class that takes a Conjunctive Wh-clause complement.
The difference is in the pragmatic nature of the Wh-clause;
conjunctive clauses are factive --
they presuppose the identity and truth of their complement. E.g,
- I am aware of/They'll be surprised by/He doesn't care what she does tomorrow.
In this example, the clause refers to the set of all actions that she is to do tomorrow,
as a settled matter; it's called conjunctive because the set consists of A and B and C and ...
while disjunctive clauses are indefinite, and presuppose nothing, E.g,
- It's a mystery/I wonder/They don't know what she'll do tomorrow.
In this example, the clause refers to an unknown set of possible events or actions;
it's called disjunctive because the set consists of A or B or C or ...
Since the conjunctive clause is presupposed, there's no need for a predictive modal like will. But the disjunctive clause is indefinite, and its truth set may be empty ("..., if anything"), so the predictive will is necessary.
Best Answer
"Yet" may be thought of as a synonym of "however" or "but," neither of which would be followed by a comma in the two examples you've given; however, if it follows a semi-colon (as in this sentence), it does require a comma by common convention.