I think you are so right with anticipating when a pill needs to be taken. I seem to be missing the early signs - but am getting much better now as I become more experienced!!
I went shopping one day and during the journey there my eyes were really playing up. I did the shopping hanging onto the trolley for dear life as the lights in the shop seemed to be affecting me really badly that day (that has been the only time its been like that!!) Then I took my pill when I travelled home. I now realise I should have taken the pill on the journey there!!!!
I find the morning times really good for me. I can get up at 8 and spend some time on the computer before taking my first dose at 9 (for convenience sake as I can usually take the others at 12 / 3 and 6 which usually lasts me until bedtime) That helps me with when the next pill is due.
I'm sure I will get better at reading the signals as time progresses .... and I am so grateful it is so mild for me when I read all your stories about your struggles.