Best way to deal with “no data found” exceptions

Hi,

Does anyone have a best-practice to deal with “no data found” exceptions:

For example:

declare vValue integer;
select x into vValue from table A where ……; /* no data returned with the "where clause */

/* “no data found” Exception breaks code execution*/

using "select count(x) from table A where ……" is possible but not the ideal solution.

Thanks,

D.