Inge, I remember that post. I was very tempted to get those shoes! Right now, I just stick to wellies.
Ana, I think both would be handy. I use the little face blotting sheets, but I think on really sweaty days, the others would be nice to have. I usually try to duck into a bathroom after a commute. This holds true in the winter when my nose tends to run. I just blot if necessary and reapply lipstick if it has faded. I also like hand lotion to freshen up any smell.
If I am in and out of buildings a lot, then hitting the bathroom each time probably wouldn't be necessary. I think any time you feel particularly sweaty, it would be fine. I do find that I often don't look as bad as I feel! Ana, you are lucky as a student; you could probably get buy with lovely sundresses. I love light dresses in the summer. They really keep you cool.
Becky, you might have a keener sense of smell than I do, but I do know the smell that you are referring to. I deal with this in a couple of ways. As I said to Ana, a hand lotion, in a light citrus smell, rubbed up your arms can work wonders to mask not so great scents. My under clothes that sit closest to my body (camis or tanks, for example) almost always get washed after one wearing. Other tops, I hang up to air out before rewearing.
I recommend hanging your clothing outside (this holds true instead of drying, generally). The breeze helps to remove odors and the sunshine smell is lovely. I will also, after hanging out for a bit, freshen clothes (depending on the material) with a linen spray. L'Occitane used to have a great one in Lemon Verbena. We have had ours for a long time, but I just looked on their page and it doesn't look like they have it anymore. Anyway, after freshening with the linen spray, I hang the item in my closet for a couple of days. I find the combination works to ease smells, but it also saves your clothing from repeated washings.