Somewhat of a Dilemma

This is more of a parenting entry...

Lately, I feel as though I'm not doing enough for G's development. I play with him, dance with him, read to him, do tummy time, etc...but sometimes I feel as though I've been at it for hours when it's only been 30 minutes or so, and then I run out of things to keep him occupied. I also will let him play on his own for some time, so I can get some stuff done around the house, etc. I'm trying not to put him in front of the TV too often, but I still feel as if I'm not doing enough. Does anyone else feel that way?

Also, I don't have him on a nap schedule yet. I've been very lucky, as G is a great sleeper. He's been sleeping through the night since he was about 4 weeks old, and naps throughout the day, but at no regular time. If he's fussy, I lie down with him on the couch or put him in his swing and he's asleep in minutes. Or, if we're on a walk, which he loves, he eventually falls asleep as well. However, I'm not sure if this is developing unhealthy sleeping habits, as he's not in his crib. Thoughts?

Gah...parenting is wonderful, but tough. So much questioning of myself. I'm interested to see feedback, if anyone has any to offer.