Ok...my typical day...here it goes. First let me say that my DH and I are real estate investors and we are continually buying and selling, and I take care of the office work. I do my work, normally on Tuesday mornings and Thursday mornings.
DS is also 3 months old.
7:00AM- DH feeds baby before he leaves so I can sleep.
8:00AM- Get up, pump, and play with DS...
10:00- He usually goes down for a nap now so I do my 45 minute workout, shower, and do odds and ends with the business. I also try and prep dinner stuff at this time as well. He takes a long morning nap which is great.
12:00-1:00- DS wakes up and I feed him, change him and we do tummy time, play in his exersaucer, or whatever we want to do.
3:00- He goes down for another nap and I get cleaning done, finish prepping dinner, do laundry...whatever. As you can see I do most of my things when DS is asleep...much easier.
5:00- DS is WIDE awake and and raring to go! Dh is home by now so I finish dinner while he feeds DS, and we all eat at the dinner table. Then DH and I either play with DS, or we give him his bath, or FEED! He eats every 3-4 hours....
7:30- We go for a 2-3 mile walk. DS LOVES this! it makes him sleep like a baby.

After this we come home, he eats again and he is asleep by 9pm..most of the time.
After he goes to be I do a TON of stuff for work, clean the house, mail letters...whatever I need to do.
In my case, I schedule everything around when DS is asleep. It works better for me.