I've always been very lucky with our little Lily in that she loves getting brushed and so sits well for her top knot to go in, however i find when i am having bother with her sitting still i give her a wee treat or teething chew and she sits and chews that while i pamper her, but probaby the best advice is keep at it and eventually they get used to it although im sure there are many Yorkies who hate wearing top knots and never get used to it
good luck
yvonne
xx