Genealogy and Ancestry for Slovakia and Czech Republic

It has been my experience that trying to get historical information for family trees specifically can be so difficult. I'm sure there are others out there who have tried to navigate past this roadblock but are unable to find help without travelling to Europe or paying big money for a researcher. I'm hoping others will come along in the same predicament and can get some tips and tricks on how to get past only 3 generations of family.