Our DS has been getting this way, as well. And, considering I'm home alone with him for 10 hrs a day, 5 days a week, days can get incredibly monotonous and frustrating.
I think part of the problem, at least for our DS, is that he wants to be more social... and he's stuck with me ALL DAY. (No family nearby, and no friends with kids.)
So I've been trying to add more outings to our schedule. Our grocery store (as well as walmart, etc) tends to have a lot of moms w/kids and elderly couples, during the work day, so that's usually pretty social for him... and plenty of new stuff to see, as well. Our library has 'baby bookworms', a 0-24 mo old story/activity time (sadly, just once a month). He also likes the kid's area of our library, because it has high ceilings with nice lights and neat wall hangings, and comfy kid-sized chairs. I haven't checked into it yet, but our library also has boxes of toys that can be checked out for 3 wks ('new' toys to play with, without the $$). I've been trying to find a mom's group, but haven't found a good 'fit', yet.
I think his memory's improving, as well, so maybe that's why he's been getting more easily bored with the same toys & activities. Today, I kept him occupied for 20+ minutes in his highchair (after solids), by dumping Cheerios on his tray (probably too young, but :shrug:), later giving him a big wooden spoon, and then giving him a red plastic baby bowl. I was able to get dishes done!
Then he was occupied for 30+ minutes on his playmat, scooting from one side to the other trying to get hold of my shoes. All I had to do was change sides, put my foot on the mat, and encourage him.
I'm not afraid to admit that I use TV (PBS only). I sit him in a spare stroller, give him a few toys and turn on Mr Rogers or Big Big World, even a cooking or travel show (something where they talk directly to the camera). He'll watch for a couple minutes, play with a toy, glance up, play, drop toy on floor, etc. Sometimes, especially when he's teething, I'll stick some fresh or frozen fruit in a mesh feeder and he'll stay occupied in the stroller until the food's gone.
Obviously, I'm not the poster child for good mothering.
And I'm definitely open to more activity suggestions! He takes 5 minutes to down a bottle, so that leaves me with 6.5-7 hrs of A time to fill!