do u have same password at all sites..?

Yes it's a must to have different passwords at different sites and there are probably people using the same passwords on many sites. It might cause them trouble if they use one of the many scam sites or sites that might be hacked or having it's traffic monitored cause of bad security.

easy to remember but not safe

Yes, I do have the same passwords for most of the sites that I have joined. I also agree that this is somewhat dangerous in so far as security is concerned. But I am very much forgetfull and basically it is also very hassle to have different passwords for each site. The only different password that I have are for my email.

I never used the same password for the accounts that I registered. I always used a different password because using the same password is not safe. Normally I use a password generator to generate password for my accounts. I stored my password using KeePass a password manager software.

I use the same password for truth site, some site i use a unique password. Sometimes i forget about my self password, so i always save in my computer documents. Anyone cannot access my password, because it hard to remember.

I generally use the same 1 or 2 passwords on al sites, but I do have unique passwords for important information, so as to keep myself safe from phishing sites. This makes it very simple to remember passwords for most sites, and the ones that have different passwords I visit so regularly it isn't a problem to enter it automatically from memory.