Usage of Present Perfect is relevant when you did something in the past that has some effect on present events or refers to something, the action still continues. So: "This morning I've woken up at 6:50 and I've got up at 7pm," - the fact that you woke up doesn't affect now, does it? It's okay to use Past simple: I woke up at... and got up at... Simple action. I've had a shower, I've eaten a sandwich, I've gone to work, I've done some paperwork, I've chatted with colleagues, I've had lunch at midday then I've drop in on Paula's house, then I've checked my email, I've run some errands." - again, you name some activities that happened during the day and if any of them are relevant to what's going on now, you would use past simple i.e.: I've had a shower, because I was stinky (result - I'm clean now) OR I've gone in to work because I needed some papers (result - I have them now and I'm gonna use them) OR I've already had lunch, I was too hungry to wait for you (result - now I don't feel like eating anymore). "And all this is what I've done so far today." - okay, good use of Present Perfect - you show all you've done and that now you're free to go do other things, you're already home relaxing. So to sum up, if you want to say about something that happened in the past, but didn't affect you now, use Past Simple. But if it's something that was important and influences your actions, use Present Perfect. See if you understand and write how you'd say they are different: I had dinner I've had dinner Good luck :)

I agree with Randy and Kala. Also, it's quite a headache to hear one's whole day described in present perfect (not to mention that adding a time makes your sentences incorrect). You can change every action in your description to past simple, but leave the last sentence in present perfect: "This is all that I've done so far today." When you use "this month", "today", "this morning" with present perfect, you are still in that time frame, and recounting your experience up to now. Again, don't give times. Remember that you cannot use "this morning" with present perfect if it is now the afternoon. ;)

Do not use present perfect tense when a specific time in the past is stated or implied.

I've been told that when you use in a sentence things like "today", "this morning", "this month" you need to use the present perfect as well ( or at least according to my grammar book). And when you use finished time periods such as "yesterday", "last month", "last year" you need to use past simple. So, according to this rule then my sentences above about what I've done today would be correct, right? I'm confused..