Fine tuning is mostly done for the SELECT statements.
Use the Keyword EXPLAIN in front Of your SELECT Statement.

eg: EXPLAIN SELECT t1.id, t2.id FROM table1 AS t1 INNER JOIN
TABLE2 AS t2 ON .....;
The result will be like this
+----+-------------+-----------+------+-----------------+-----------------+---------+-------+------+-------------+
| id | select_type | table     | type | possible_keys   |
key             | key_len | ref   | rows | Extra       |
+----+-------------+-----------+------+-----------------+-----------------+---------+-------+------+-------------+
|  1 | SIMPLE      | table1    | ref  |        t1       |  
     t1       |      4  | const |    2 | Using where |
+----+-------------+-----------+------+-----------------+-----------------+---------+-------+------+-------------+
1 row in set (0.00 sec)

if the "ref" column value is found to be ALL, then the two
tables must be joined properly. if the "Extra"  gives values
like 
Using temporary; Using filesort then the columns  in the
JOIN conditions and WHERE clause must be indexed properly. 
By doing this we can make our queries executing faster.

If ur Television was not working means we have to do the
fine tuning.
Step 1:Take the Remote
Step2:Go the menu Control OR Program 
Step3: In Menu Control Or program u will see fine Tunning
Step4:Change the status of the arrow in fine tunning
Step5:if the Television still not working means
Step6: Take ur Television and go to beach. Jump into the sea
along with ur Television