Don't sweat it too much. I do suggest setting an alarm but you blood levels do this when you take once a day medications:
So you can see they go up and down every day, and increase fast to start with and then slow.
The high point is called the peak and the low point the trough. If you are late with a dose all that happens is that the trough level falls a bit more. Provided that the trough is still above the MIC (Minimum Inhibitory Concentration) then the virus gets no opportunity to capitalise. The standard dose gives you plenty of wiggle room on the MIC and the only circumstance it might matter even a little bit is a long delay in the context of some pretty nasty RAVs.
So, do take it as close to the same time each day as you can, but don't panic if you're a bit late, or even if you miss a day (most people do this).
I had one patient - GT2 to be fair so easy to cure - who took his meds for 4 weeks, forgot them for a 2 week holiday, took them for another 4 weeks and then just left the rest in the bottle. Lucky bastard still got SVR12 which seems totally unrighteous, but there you go.