S., i guess i will be the dissenting voice here, it seems a lot of moms are advocating cosleeping, but if you would rather not do that, i will tell you my experience...my son just turned 3 and it seemed a switch was flipped, he turned from a sweet, lovable, biddable, cream puff into a hormonal teenager overnight lol...we are working on discipline issues BIG time right now. and with this he has turned from a 99% of the time GREAT sleeper, to about 50-75% of the time. i am not complaining! but there for a few nights it seemed he was having real trouble. one night i even posted on here about how am i supposed to know the difference between him playing me about sleep, or something being really wrong, because he cried for 2 1/2 hours. turns out nothing was wrong at all. i have come to the conclusion, in my situation (can't speak for others!) that i have a very smart, strong-willed, STUBBORN child, who is reaching out and testing his independance and his power. i decided it was time to put my foot down. like i said we are dealing with discipline issues, and i have now stopped going into his room when he fusses/cries. at least waiting a lot longer. and you know what, after a few minutes he stops. i got so used to him, in the first 3 years of his life, sleeping like such a champ, that i didn't realize what was going on. now after a few minutes of fussing he goes right back to sleep. i like to think of this as a battle won. and yes i still hear him in there 2-4 times a night, fussing around. i think it's due to dreams, and maybe a growth spurt...but the point is he goes back to sleep on his own. thank the lord! anyway, this worked for us, i have no issues with co-sleeping except for myself, i shudder at the thought of an angry toddler refusing to sleep in their own bed, should i ever want mine back...and my son is just smart enough that he would pick up on that REAL quick. so he has never slept in my bed except when he was sick. hope this helps...i know i ramble, sorry! short and sweet - i put my foot down and quit catering to him, and it worked. he's doing much better on all levels now. good luck!