I had a tree, originally drawn up by my grandfather, of his side - but with no dates or locations! I later found a few errors there. On my maternal side, precious little. I started hunting about, records offices, etc. and then online, then joined "Ancestry", and got a bit more serious.
Never really managed to solve any of the main mysteries ... why a great grandfather Andrew Keating ( a baker) died in 1933 in Fleetwood, rather than Southport, where I'd expected him to be - or where in Ireland he'd come from in the first place! Where exactly earliest known paternal ancestor was born... where in Ireland Thomas Cummins came from ... in fact most of my "stickers" relate to Ireland!!
That tree did stimulate my interest. Sadly only started after both parents dead, and not many older relatives to ask. One person, cousin to my father, was wonderful, allowing me access to her research - and in return I was able to do some research online for her maternal ancestry, and her husbands.
I wish I'd had the family papers, albums, letters so many people seem to have had and been able to access, or the large mass of relatives ... only children seem to have run in our family, so there have been very few to ask or to confirm findings.
My advice to you all: Get the info whilst oldies are still present, both in mind and body!