DrugMonkey makes a good point on my previous post. It got me thinking about multi-tasking.
When you are a PhD student, you don't need to do a lot of multi-tasking. Oh, and I don't include doing three experiments in one go, as multi-tasking. The closest a student gets to is, say, doing experiments and writing an abstract for a poster at a conference. Most PIs I have known actually allow students to have writing time for reports (of course, writing a thesis involves a lot more effort so having writing up time is obvious), and also some time for writing a paper, if the student actually gets to write any of it at all.
But all involving (typically) one project. The sequence of events and deadlines are mostly linear, and despite hearing the PhD student readers objecting, I don't think it is hard to schedule that.
When you get to a postdoc level, you have to step up. You are typically involved in more than one project, even if there is a major and minor projects. You might have a student to look after (in my case, when I did, I spent quite a lot of time, effort, and vocal chord health for the student. Talking takes so much energy...). Your supervisor might dump you to write an abstract, some kind of short paragraph for a grant he is writing, take part in interviews (i.e. show the applicants around and "chat" to them). And not only do you not have a rought idea according to the academic calender when they will happen, they might not tell you before hand about it.
You also should be looking out for yourself. It is up to you to find fellowships, go to interesting seminars, keep up to date with journals, if you haven't gotten into the habit already.
And you should realise that things don't happen in an instant. You do not get the results of your actions quickly. So you have to keep going, and change tack everytime you get new information.
Where is this all leading, regards to DM's comment? Well, I totally agree that it is a mistake for that postdoc to think that one paper will change everything. It will not, and for a person with his experience (two postdocs!), he really should know better.
If you were a student, you might think that one paper will change everything - and it might, especially if it is your first paper. But a postdoc on his second contract? Uh-oh. People might question having a paper "submitted" on your CV, but is it worth stalling an application for?
Stalling anything for the sake of one paper, is not productive. And especially nowadays, when it might take (gasp) a year for the final manuscript to get accepted (from the initial idea), it is not efficient use of your time to wait for that one paper.
BTW, I didn't learn this all by myself. I was watching how my two postdoc supervisors dealt with things, and that is what I noticed. You can't wait until you know for sure, or get the correct info, or get that last result. You just start it rolling, do as much as you can, and if things change, you change your plan with it. I think it is far more productive and less stressful for you.
Personally, I get set in my ways. I need to remind myself to keep the flow going, and that nothing is concrete. It goes against me sometimes, but it is for the better if I flow with it.
To go with that, is another rule - never say "I'll do that in more detail later". That's a cardinal sin. Seeing my ex-boss, who is a very busy man with his finger in more pies than you can imagine, every moment is important and has to count for something. So when he has a chance to read, edit, write a paper, he gives it his full concentration.
That is also something I have had to learn too, as I've often not had that kind of pressure on my time. There was always "later". But doing things later, is such a waste of time. Why do it twice when you can do it once?