Well awais Bhai !
As per my experience the Affection & Care you have for Ur car can't be compared with any one who'll just wash Ur car for only Money!!
They'll just wash Ur Car Mostly with Some Ordinary Surf Sodas which isn't good For Long Run Shine But If U do it Urself It'll Require Some More time!!
or If U've a Sincere & Nice Driver as I've is also good.
As for Tips & Guides I dont think so U'll ask any body for Tips After visiting this forum :
Here Usman bhai (Vague_one) is so much Informing & A Really Nice Person!!