Best practice to change SharePoint service account passwords

How to change service accounts and service account passwords in SharePoint Server 2007 (MOSS2007) and in Windows SharePoint Services 3.0

microsoft site reference: http://support.microsoft.com/kb/934838

Just changing domain account password from sharepoint services and from Application Pool identity will not do.
you have to follow the above article.
in short execute the following in batch (.bat) file will also do:
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cd %commonprogramfiles%\Microsoft Shared\Web server extensions\12\Bin

stsadm -o updatefarmcredentials -userlogin domain\enterusernamehere -password enternewpasswordhere
iisreset /noforce

stsadm -o updatefarmcredentials -userlogin domain\enterusernamehere -password enternewpasswordhere -local
iisreset /noforce
           
stsadm -o updateaccountpassword -userlogin domain\enterusernamehere -password enternewpasswordhere -noadmin
iisreset /noforce
       
stsadm -o spsearch -farmserviceaccount domain\enterusernamehere -farmservicepassword enternewpasswordhere
iisreset /noforce

stsadm.exe -o spsearch -farmcontentaccessaccount domain\enterusernamehere -farmcontentaccesspassword enternewpasswordhere
iisreset /noforce
       
stsadm -o editssp -title (SharedServices1 change accordingly) -ssplogin domain\enterusernamehere -ssppassword enternewpasswordhere
iisreset /noforce
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