This may already be common knowledge and I'm the last to catch on but the time I have spent over the years trying to fit clothes over these bloody dolls teeny, wriggly hands and I've only just found out! DD got a few Lol OMG dolls for Christmas. I'm sitting there trying to get the bastarding jackets on and DD says "why don't you just pop the hands off?". I'm sorry, what?! Give them a little pull and off they come, leaving a nice solid arm to slide in to the clothes. Then the hands push straight back in. Mind blown.
Any other toy assembly tricks I don't know about?!