Nice to read this thread - I was actually just wondering about this very thing this morning...
Freya is now 6 months old. I take her out for a piddle around 7am, and back inside for about an hour so I can have my coffee and breakfast while she lounges and follows us around.
Then it's off to the park for about an hour - mostly walking, some playing, and obedience whenever I can get her attention.
Back home now, she eats her brekkie, and then naps (mainly because I ignore her). She gets up and follows me every time I move, but settles back in pretty quickly ;-)
She'll wake up usually around lunchtime, out for a piddle again, and back in for a bit of obedience and some playtime.
Naps again until about 4ish, more playtime & obedience, and excitement levels through the roof once hubby gets home. Off to the park for another hour of walking and playing. Dinner for all of us once back home, and she usually stays up now for a few hours not wanting to miss anything. Really cute watching her watching us, with droopy eyes trying to stay awake. She usually passes out around 8pm.
We wake her for a final piddle around 9 or 10 pm, and then she sleeps most of the night. Sometimes, we hear her in the middle of the night chewing on her bully, or doing a walkabout - but she generally stays quiet until we get out of bed.
Before I started this schedule, she didn't sleep much at all, and we thought we had to keep her entertained all the time. Once I figured out that she'll settle if I ignore her, it's been great!