The basic brewing process for the kits I've done as specified in the instructions for most kits is a straightforward empty the can(s) into the sterilised FV, adding water, when its at the right temperature add the yeast, put the lid on with an airlock, wait until fermentation finished, bottle or keg it with some priming sugar, leave it to carbonate and drink.
What improvements or tweaks to this do you recommend and how does this improve the brew?
I'm thinking things like avoiding tap water, so no chlorine or using campden tablets to remove chlorine, improve temperature control, do you use second fermentation, cold crashing and that sort of thing.
Anything really to help the less experienced improve their brews.
Try this although you may be past the point at which is it really useful to you
Basic beginners guide to brewing your own beer from a kit - The HomeBrew Forum
Kit brewing...
- IMO one cans all need a 'boost' of some sort, don't rely on 'kit and a kilo', plenty of ideas here for example
http://store.coopers.com.au/brewing-info/recipes.html
- water use for brewing is up to you, if tap water is good enough to drink without a second thought it's good enough to brew with, I use tap water, using Campden tablets made no difference as far as I could tell so I don't bother any more, also water treatment not needed for kits
- one cans (and toucans with no extra hops) will benefit hugely from a hop tea or a dry hop
- the more malt you add to your brew the better it will be so instead of dextrose think about more malt; and if its a 1.5kg can (Youngs or Wilko) then think about brewing short
- usual stuff about sanitising kit
- don't be paranoid about 'oxidation', just sensible about avoiding directly introducing air into your beer; you have better things in life which need your attention
-try racking off after the primary, it does reduce the yeast load, I do it, others don't, see what you think
- cold crashing does work, if you have the time, space and inclination it might be worth setting up a brew fridge which will help your brewing in other areas; I don't have one
- don't brew in the middle of summer when ambient temperatures can be upper 20s*C
- temperature control as others have said should help, I have a water bath which is used in winter
- 2+2+2plus but not all beers need conditioning for long periods especially lighter
beers; dry hopping effects do diminish with time too
- keep a record of what you have done, so that you can look back and learn from your successes and any failures
- try as many kits as you can there are plenty out there
- try things you see on this Forum and form your own opinion about whether they work for you