I've had to practice a lot over the years cutting and installing. Longer pieces usually install best with a helper.
Couple of tips:
I would use measuring rods (two pieces of stock where you measure and make a reference mark) where you can instead of tape...more accurate.
Lay the piece upside down in the miter box and cut. The saw cut across the "thick" edge should be perpendicular to the moulding.
The cut section provides a line on which to cope a connecting joint. You just back cut deeply (usually more than a 45 degree angle) along the profile line of the trim. Little time consuming and takes practice, but makes for best fit, especially in uneven finished drywall joints.
- 15 Old House Features We Shouldn't Abandon
- 17 Tiny Bathrooms We Love
- 16 Designs for a Low-Cost DIY Coffee Table
- Insanely Easy 60-Minute Home Improvements
- 12 Sheds You Could Live (or Work) In
- Assembly Required: 15 DIY Kit Homes
- 30 Things Every Adult Should Know How to Do
- 10 Surprisingly Simple Woodworking Projects
- 7 Surprising Other Uses for Mayonnaise
- 9 Ways to Make Your TV Look at Home
- 9 Totally Amazing Mobile Home Makeovers
- 8 Cleaning Mistakes Everyone Makes
- 10 Insanely Creative Shelves You Can DIY
- 10 Bargain Organizers for a Tidy Garage
- 7 Easy Budget-Friendly Backyard Makeovers
- 9 Backyard Fire Pits You Can Afford
- 10 Things You Didn't Know Windex Can Do
- Watch These 10 Home Trends Take Off in 2015
- Surprisingly Simple Woodworking Projects
- 16 Garden Borders You Can Make—Easily!