I try to put up with the sniffles and bunged upness as much as possible because when I've taken anti histamines for more than a week at a time they seem to not work as well. So If I'm feeling particularly unhappy I take a Benedril (or cheaper counterpart) and if after half an hour that's not doing the trick I take a claratin or generic centrizine). As to whether go branded or generic, I swing back and forth. Mostly I buy whatever I see cheap first so branded on special offer or if not got a choice), but I do notce that the quantity of active ingredients is often much larger in the branded versions.
I totally agree with the face/hand washing method too. I'm so used to being a dirty scrote that i don't normally wash until I've got home and had a cuppa in the evening, but at this time of year I go straight to the sink and wash (not just a rinse off, but soap as well!) and change my t-shirt. If I've been in a high-pollen environment I wash my hair at that point too, it makes a difference.
I find its worst in the evening and then again in the wee small hours when I should be sound asleep. Also certain pollens are worse than others. Growing up it was rape, unfortunate since I grew up in Essex where it is almost entirely rape fields. These days its mostly tree pollen, also a problem give that my workshop is in the middle of the woods!