How can i find out about ancestors that have passed on?

Question:

How can i find out about ancestors that have passed on?

Best Answer - Chosen by Asker: Name. Location. Time frame. These are the key elements to successfully knowing where to look for information.
Hopefully, you have already found the part that says to start from you, and build from there? Now you get to a parent, and you have the name. You might have to place them in a location based on the birth of a child, but that's a start. Say, somewhere in Missouri. Child is born in 1910, thus you know at LEAST that parent was born prior to 1910. Child is youngest of 12? Estimate age from that.
All children born in a particular county? Zoom in... usgenweb has a county website for all counties in the US (and this is a world wide project). Census? County history? Land records? Newspapers? Siblings? The same process applies to each person in your lineage.
Here's a surprising fact... there is actually more stuff out there about the earlier ancestors. In a general sense, records from the last 75 to 100 yrs is limited for security reasons. Every generation back that you do, increases the number of likely descendents and increases the odds of finding a cousin who is also working the same ancestor.
THINK BEYOND THE INTERNET. Use it as a lead only, mine what is online, and use your imagination concerning what is possibly out there, but not in digital form. Family Bibles, unsurveyed cemeteries, land records, personal letters packed away in a trunk. Go the extra mile beyond family members who want the info, but don't want to leave the house to get it.
The whole point of research, to me.. is digging out the records that pre date what living persons remember.