Dear Lifehacker, I was thinking about buying a larger/better trailer than what I need for myself with the intention of renting it out to other people to help recoup the cost. Is it possible that a speeding or red light fine would go to the owner of a trailer if the camera was behind the vehicle?

Dear Lifehacker, I've heard that I should be "mixing it up" and changing up my workouts at the gym. My friend, who's a bodybuilder, told me that this is called "muscle confusion" and will force them to grow. I only know a few exercises at the gym so changing seems even more difficult. What do I do?

Dear Lifehacker, Why is all pizza these days so freaking salty? I don't just mean somewhat salty; I mean if I made my own and dropped the salt shaker in it that would still be less salty than my local Domino's or Pizza Hut. Can they add so much salt? Surely that can't be healthy. Do pizza makers have to comply with any rules in this area or can they legally add as much salt as they want?

Dear Lifehacker, I consider myself a pretty organised person. The rest of my family? Not so much. It's not that we're totally out of control or anything, but with three kids, there are lots of activities, messes abound, and schoolwork is always a hassle. What can I do to get us all more organised and in sync with each other?

Dear Lifehacker, Today my manager told me that, rather than paying me a bonus each quarter, she would prefer to incorporate that bonus into my base salary moving forward. I fear this puts me in a bad position for negotiating a salary increase this year. Am I better off asking to keep the bonus and then negotiating a pay increase or should I accept their offer of incorporating the bonus into my base salary?

Dear Lifehacker, I'm shopping around for a tablet and have noticed that the one I am after is available much more cheaply online ($100 or more). How likely is it that the local retailers (JB Hi Fi, Good Guys, Harvey Norman and so on) will be willing to match this?

Dear Lifehacker, I am thinking of purchasing some whitening toothpaste to try and get my teeth a few shades whiter. Does it actually work? Any recommendations?

Dear Lifehacker, I've recently relocated to London for a year or two and am looking to start work. Most of my applications have been via recruiters who have responded with a range of roles. I'm interviewing for a couple of jobs this week but one is about 90 minutes away in another city and the other sounds like good work but the organisation might not be the right cultural fit for me.

Dear Lifehacker, In the past, I've assumed most doctors are charlatans, and only visited them in matter of dire emergency (needing a sick note for work, week-long flu, etc.). I am now reaching a point in my life where my body and mind are getting older and I am reconsidering past decisions.

Dear Lifehacker, I read somewhere that a creative workspace can lead to higher productivity and wanted to know if it's true? I work in a boring office job (it pays the bills) but I'm a creative type at heart. My question is, how can I add creativity to my corner of a boring workplace to inspire myself (preferably without getting in trouble)?

Dear Lifehacker, I have a question about the rights of bottle shop assistants to check IDs. I was at a bottle store a few days ago with a friend buying two bottles of beer. The checkout assistant asked for my ID which was fine and even a bit flattering (I'm almost 30). But then she asked my friend for her ID too.

Dear Lifehacker, Lots of people are chronically late, and one big reason is the habit of always trying to do 'one more thing' before heading to an appointment. I suffer from this, and I've asked enough people to know that I'm not alone. Such people plan their day carefully, they know what time they have to leave, but they think 'I'll just do this one more thing before I go'. And that turns into another, then another, all small and probably non-urgent tasks that should only take up a few seconds but end up taking minutes, and then they end up late! Is there any way to deal with this? Thanks, One More Thing

Dear Lifehacker, Recently I have been confronted with a staggering number of various spiders. I am not bothered by the majority of them, but red backs, funnel webs and other poisonous specimens are a little unnerving. What's the best thing to repel or kill them, other than straight poison from the hardware store or a large boot?

Dear Lifehacker, I have been working on a comic series for a while now, using a free software with a limited sprite library. I am now getting to the point where I want to have it illustrated so I can sell copies at conventions and the like. My question is: how much I should pay the illustrator?

Dear Lifehacker, I'm thinking of moving on from my current job, but there's a problem. I have some health issues that require a weekly appointment and I currently have my appointment on a Friday afternoon. My current manager has rearranged my work hours slightly so that I can attend this appointment. My question is: if I get an interview for a new job, should I tell them about this at the interview? If so, how do I go about it?

Hi Lifehacker, My fiancé and her parents are looking to sell their beauty salon so they can open a coffee shop. To keep an income stream, they want to continue working in beauty from home with existing customers. Is this possible or are they subject to some form of goodwill when it comes to the clientele of the current business?

Dear Lifehacker, How can I get rid of the dark circles under my eyes? I sleep and drink lots of water and it lightens but never goes away completely. My employer has even assumed I'm a heavy-drinking night owl! Any advice?

Dear Lifehacker, Everyone is saying artificial sweeteners like aspartame are bad for you, and now Diet Pepsi is removing it. Should I worry about how much diet soft drink I've been drinking? What health hazard have I been exposing myself to all these years? And should I worry about the new sweetener that's replacing it?

Dear Lifehacker, I know you've offered tips on beating the heat in the past but this week takes things to another level: the temperatures are so high, especially in Sydney, you can fry an egg on the bonnet of your car in the early morning already. How can I cope with this stupidly hot weather?