Recently, I got a chance to learn about a technique which I knew about but have never used before. This was definitely a great experience for me, as a big part of doing a PhD is learning new techniques and expanding your knowledge. There are certain techniques and experiments which will be applicable for a lot of fields, while others are more specific to certain fields, and having a chance to use a technique which may not necessarily be a standard in your field is rewarding and also helpful in improving your knowledge (as you can probably imagine). Also, it's like a breath of fresh air when you are stuck repeating the same experiments.
Projects will require a different set of techniques, and each set will be different. And the truth is, there is a difference between knowing the theory behind the techniques and knowing how to use them (however, knowing the theory definitely helps, especially when you’re stuck); even though I knew the theory of Western blotting, it still took me ages to get one to work! Sometimes, when you need to do a particular experiment that you've never done before, this can mean collaborating with other people in your group, or other groups. Given the vast amount of techniques available, you end up knowing quite a lot about a few, selected techniques, so collaborating is a fantastic way of learning that little bit about a different technique - who knows, that little bit of knowledge may in fact give you an edge in future job applications! I guess that is also why a lot of research papers contain a lot of authors.
This PhD has been enlightening in that I have got to see how research actually works in reality; from how to figure out why the experiment is not working, to getting an insight into how long it actually takes behind the scenes – I now know how long it can take to get the data for a paper, then how long it takes after that before the paper is actually published, and I really didn't anticipate how frustrating that all can get at times. All in all, I have really enjoyed getting to use the techniques which I have learned, and I suppose learning something new recently reminded me of the thrill of research and why I wanted to do a PhD in the first place; definitely helpful to be reminded of that when you are lacking motivation... Use opportunities to expand your knowledge when you can, because, like I mentioned above, you never know when that little knowledge may come in handy...