Here's a county-by-county breakdown of election information you might find helpful:
Harris County
Voting locations | Democrat Sample Ballot | Republican Sample Ballot | Election website
Fort Bend County
Voting locations | Sample Ballots | Official county election website
Montgomery County
Election Day voting locations | Democrat Sample Ballot | Republican Sample Ballot | Official county election website
Galveston County
Voting locations | Official county election website
Brazoria County
Official county election website
Chambers County
Voting locations | Polling locations | Sample Ballots | Official county election website
Liberty County
Voting locations | Democrat Sample Ballot | Republican Sample Ballot | Official county election website
Waller County
Voting locations | Official county election website
Grimes County
Voting locations | Democrat Sample Ballot | Republican Sample Ballot | Official county election website
San Jacinto County
Voting locations | Official county election website
Matagorda County
Official county election website | Democrat Sample Ballot | Republican Sample Ballot |