Well, I have been t1 for over 30 years...so can identify where you are coming from. Persoanlly, like has already been said, as long as you test, and your blood sugar stay in the acceptable range for you, you don't HAVE to receord it...although if you notice that you are having erratic blood sugars, then it is always worth doing to see if there is a pattern.
7.9 isn't the worst HbA1c in teh world...I know many drs would be quite happy with that. It is, however, above the goal limits, so you do need to wrk on it. Please be aware, that depending on where youget your care from, some Drs/nurses will not be too concenred at a level of 7.9...as sadly, they will see many readings far higher than that everyday. thsi doesn't mean that you can relax though, as you really should be aiming for 7 ish or below. You will see on teh boards here, that different people have different levels they aim for...me I want to be about 6 to 6.5 (still working at it!)
Another point to note though is not to get too hung up about the odd drift of 0.1 or so. My GP and my diabetes consultant are in differnt PCTs, and both insisist on doing their own blood tests. I had 2 HbA1Cs done on consequtive days...one at 7.1, one at 7.4....so it does seem that there is a certain level of uncertaintity in these things! Aim for as low as you can, without being hypo all teh time..best of luck!