Is the bum pillow an old wives tale? Damn those old wives and their unreliable fables.
I'm PCOS, underactive thyroid, so I'm on Metformin, Clomid, Folic Acid (of Course), and DTD every other day, plus charting, and temp taking.
Was told by consultant that OPK tests would not work for me, but have heard of other women on Clomid with PCOS using them? 
Other than that, healthy diet, little to no caffeine for both of us, mild exercise, and just trying to be generally "healthy".
Having sex 3 times a day for conception purposes is a waste of time, as the man needs about 48 hours to get his sperm to be the best mature little swimmers he can make.
If you SWI too often the sperm are immature and unlikely to fertilise anything!