Well......the guidelines are "in an ideal world", and I don't want to be the cause of inducing lots of guilt in mums who are stretched to the limit! To be honest, the guidelines made me feel a bit better, as I thought I should spend every spare moment entertaining dd (especially as I "only" work part time). I don't know what they suggest if there's more than one child (I only have dd to consider). I'll see if I can search out what they suggest for mums of multiple children, and will post what I find.
I try to find little ways to make "together" time in the course of the day. For example, it works well if I get up/bathed/dressed before dd (know I'm lucky that she sleeps until about 7.30), then we can start the day cuddling, talking and reading books (without the same mad dash to get out of the house in the morning), so that counts toward time focused on her. We also read/talk/sing before her nap, and before bed at night, and I count that as together time.
I have found that the idea of 80 minutes a day can be daunting if I attempt mostly inside playtime. Sometimes it's unbearable to pull out the same old toys day after day.....So, we go out alot, and I try to integrate "together time" into our routine. For example, on the way to/from the shops, we might detour to feed the ducks, or stop by the playground, or even go to the train station to watch the trains come/go. If we're walking on a quiet street, we might play a game of hopping or walking backwards. If she's in the pushchair, we might play "I Spy" or sing silly songs. By doing it that way, I feel I've focused on dd, and then don't feel guilty that I'm dragging her around to do chores/errands with the expectation of good behavior/cooperation without doing something "just" for her. I also don't feel bad when I have to get on with things at home, and need her to entertain herself (must confess to an over reliance on videos to occupy her when I'm not available as a playmate).
Of course, I've described the way I'd like it to be all the time.....and not necessarily what I achieve. Without doubt, some days I feel more energetic/creative/resourceful and "get it right". Other days, I feel guilty that I haven't been much fun as a mummy. But, that's the real world I suppose.
Finally, I should say that I only have dd to consider. While I am a single mum, and don't have a dh/dp to share the load, I tip my hat to all you mums who juggle more than one.