Hey stoners, how much is too much?

[MoreWineII]

Lately I've been wondering if I should cut back a little bit on the weedness. I smoke maybe 4-5 times a week in the evenings and maybe a hit or two in the morning when I know work is going to be particularly boring and/or annoying (which is maybe 2-3x per week)

There's been nothing really leading up to these feelings other than my head has felt a little muddled lately, more than I'd like it to. Nothing serious, just a general cloudiness at times.

What signs do you other potheads use as a warning that you need to cut back for awhile? Or do you even care?