How do you tweak it?

What do you do and how long do you wait to see if it worked.

[proboscis]

If I make a change and it appears to be not working, is 15 days long enough to tell if I should change it back?

Also, is it generally a bad idea to make more than one change at a time?

[adamxcl]

15 days would be plenty more me unless it's real close in numbers. If anything goes way up or down, I'll note it right away. If things went way down for more than a day, I'd tweak it.

[iwannano1]

1 week is sufficient, IMHO , however according to Google you should wait 2 weeks