looking for simple diary and todo list... any recommendations

Just looking for something simple - diary and task list/ may projects as well, that I can use on pc and possibly iphone.
Currently using todoist, but I need something else as well (to run separate businesses).

Any recommendations?

 

https://trello.com/tour

It's good if you want to collaborate with people or work with a team of people, could probably be useful for a single user too.

 

Evernote or Remember the Milk

 

Trello is great.I am currently using it for to-do list.It also provides checklists,labels,stickers,due date.

 

ok I signed up with Trello, going to have a play around and see what its like. Thanks guys.

 

I use asana.com

or download the action machine from download section

or even microsoft outlook