Here are some things to look for when you want to repair a fence. I didn’t take extensive notes as a lot of the things they said I did not understand or I felt uncomfortable in trying to use unfamiliar tools. I’m very shy in that regard. My efforts to lift a section of fence to drop into the metallic slots were also unsuccessful. I’m a bit of a wimp.

Here are some of the simpler fence hints. Look at the links for more details. In this case I’ve arrange from HomeDepo to give me an estimate on the repair

-Look at the fence first to determine the cause of the damage before you can define the solution. Measure the damaged areas and document.
-Fences need repair because the weather has rotted the wood. Best woods to repair a fence -Pressure-treated wood that has preservatives put into he wood. Other alternatives are Cedar and redwood.
-Distribute nails evenly so the new post is firmly fixed to the fence’s frame.
-Saturating an area of wood rot with wood preservatives can help prevent the rot from spreading.
-Use galvanized nails since they are coated to prevent rust. 10d nails might be a good choice.
-Caulk the top and sides of the repair to keep out moisture
-Use replacement boards same width color and length as the old.
-Nail top of board to beam first as the bottom may need aligning later.
-You can actually install a new post by impelling in a metallic peg into the base of the old post. The metallic peg is called the ospost system. They come in two lengths T4850 which is 34 inches in length and the T4600 which is 24 inches in length. Look at link to see details.
-You might be able to fix a broken post by inserting boards on each side to provide alternative support and pour concrete around the new supports.
-Put two inches of small rock (gravel) at the base of each hole so that water can drain away from the post.
-You can pour excess concrete into a cardboard box for easy disposal.
-Use a handsaw to remove the damaged section of wood if a pry bar does not work.
-Often a fence gate is misallied because of problematic hinges.

Sources: http://www.youtube.com/watch?v=Ja1idbbKo58
http://tlc.howstuffworks.com/home/how-to-repair-a-wood-fence.htm
http://www.cockeyed.com/lessons/fence/fence01.php
http://www.doityourself.com/stry/storm-damage-repair-mending-a-broken-fence#b
http://www.ehow.com/how_6749116_repair-broken-fence.html