How much is too much??

As humans , the most intellectual beings(so they call us) and not to forget supposedly the most social(puppies r more social dan us ya!!) we r gifted(perhaps?) wid the art of judgement..Not getting into d details of this "art" right now, coz its a never endin tale..I must admit i am intrigued by this concept of How much is too much??
We all draw lines fr ourselves in the form of boundaries, restrictions..in short we draw lines.. whthr or not we realise, evry single one of us does it..sumtimes conciously..sumtimes by mere instinct! .. But i was jus wonderin off late, wat makes us decide on these lines?? How do we know wen its too much?? How do we knw whether its a risk or whether a safe bet wid absolute no inclination to wat d future holds?? here are some quests to whch answers may or nt even exist..n sinc i loveee askin questns..my list goes on..
1.How much of nagging is too much??(wen it gets obssessive n all een if nt too much dam rght scary!!)
2.How much of stdyn is too much??(stdyn till 30 is k na:P )
3.How much of mush is too much??
4.How much of anger is too much??
5.How much of tolerance is too much??
6.How much of flirtn is too much??
7.How much of sleepin is too much??
8.How much of waiting is too much??(5yrsssssssss!!pheww!!!)
9.How much of nt showin emotions is too much??...dis one prolly wudn like 2 b told d ans:)
10.How much of trustn is too much?? (sum ppl neva learn!!)
11.How much of being ond fone is too much??(pls dont say less dan 4hrs at a stretch)
12.How much of Thinking is too much??ahahahahhaa!!!
13.How much of IP is too much??...far frm reachn dis state..dammn gtg bak 2 it....
these 13 fr now...m sure many more 2 add...