Lay down the drop cloth to protect floors; remove existing baseboard; wipe wall with clean, damp cloth to prepare painting surface.
Using the tape measure, determine height for the top trim board by measuring up from the floor and lightly marking with a pencil; use the level and pencil to draw a horizontal line the length of the wall.
Affix painter's tape just above the horizontal line and any adjacent walls; apply pressure to tape to ensure tight seal with the wall.
Using the angled brush, apply paint just inside taped areas, then paint the remaining area with the woven roller; remove painter's tape while paint is still damp; allow paint to dry 24 hours.
Prep wooden boards by lightly sanding any rough surfaces; wipe with clean, damp cloth to remove dust or debris.
Using the angled brush, paint all sides of each board; allow paint to dry completely.
Install baseboard to wall by inserting finishing nails with the hammer along the studs.
Tip: Use a stud finder to locate studs. If you don't have a stud finder, know that most light switches and outlets are attached to a stud, which are typically spaced 16 inches apart.
Install vertical boards along studs by aligning bottom of board flush with the baseboard; secure to the wall with finishing nails and hammer.
Install top horizontal board flush with the vertical boards; insert finishing nails along the studs.
Use latex caulk to fill in all nail holes and gaps; use the clean, damp cloth to smooth caulked surfaces and allow to dry.