A couple of words of warning: watch out for retailers offloading slow moving stock – you’re only saving money if you were going to buy it anyway. And don’t assume that just because it’s on sale you’re getting the best price. As ever, shop around for the best price. AmazonAmazon will be adding new deals every ten minutes today, and if you're an Amazon Prime customer you'll get a half-hour head start. That’s open to people who sign up for the free one-month trial, but remember to cancel if you don’t want to pay £79 a year for the service.At the time of writing, deals include: Kindle Paperwhite - £79.99 (was £109.99) 35% off Gibson and Epiphone guitars 40% off Le Creuset casserole dishes Guitar Hero Live 2 Guitar Bundle (PS4 or Xbox One) - £74.99 (was £124.99) Currys / PC WorldThese stores launched their Black Friday season on 24 November, promising 30% more deals than last year, and 40% more stock on sale. And 'thousands' more offers have been unveiled today.Deals include: Samsung Ecobubble 8kg washing machine - £299 (was £499) Beats by Dr Dre - £169 (was £269) Dyson V6 Cordless Vacuum Cleaner - £279 (was £429.99) 10% off all ‘built-in’ household appliances over £299 Carphone WarehouseThe Carphone Warehouse has pulled a few more offers out the bag today, including £100 off the iPhone 6s. These are on top of the previously announced deals in the 10 day sale that launched on Monday. Deals include: Apple 6s - £100 off up-front fees (now £50), at £32.49 a month Samsung Galaxy S6 – £22 a month contract, no up-front fees (normally has £200 up-front cost) Samsung Galaxy S6 handset only - £349.99 (was £399.99) ArgosArgos is offering big discounts, particularly on its tech and toys. The high street retailer began its ‘Red White and Blue’ Fridays in October, but it's finally caved in and joined the Black Friday pack. Current deals include: Kenwood FDM780 food processor - £69.99 (was £139.99) GoPro Hero 3 - £149.99 (was £289.99) Seiko Men’s Chronograph Black Watch - £87.99 (was £219.99) Pip Ahoy Pips Playground Playset - £17.49 (was £34.99) Smyths ToysSmyths will be keeping stores open until 11pm on weekends until 1 December, when its Black Friday sale ends. They've suspended click and collect services today to throw all hands on deck. Deals include: Better than half price offers on some Disney toys, including Frozen favourites 20% off Lego City products Peppa Pig Cook and Go Kitchen - £19.99 (was £34.99) ZavviZavvi's carrying on its flash deals, and there's huge discounts on boxsets. Current deals include: Peppa Pig Ultimate Collection - £34.99 (was £79.99) Family Guy complete collection - £24.99 (was £199.99) Lord of the Rings extended edition - £14.99 (was 63.79) Disney '4 Timeless Classics' - £17.99 (was £46.99) GameHas announced its full range. PS4 with three games and now TV - £269.99 (was £389.99) Xbox One with three games and now TV - £249.99 (was £359.99) BootsBoots' Black Friday deals will run through until Monday. The Boots Advantage card is one of the most generous reward schemes on the high street, worth about 3% of your spend. If you've been racking up points, today could be a good day to cash in. TescoThe supermarket has announced its Black Friday sale will run for four days, but it has announced no details of what it will be offering yet. In the meantime, current offers include a free game with any Xbox console, 3-for-2 on cards, Christmas decorations and wrapping paper. If you buy online, Tesco is warning it’ll take 5-7 days to deliver. DisneyThe offers at the Disney Store aren't outstanding, but if you're buying this year's must have Star Wars toys today's a good day to do it. As well as the discounts, you'll get a £5 voucher if you spend £50, or £10 if you spend more than £100. Sainsbury’sIt has indicated it will only be ‘moderately’ participating in this year’s feeding frenzy. The deals are in-store only, not online, so visit your local branch for details. John LewisJohn Lewis' ‘Never knowingly undersold’ commitment means they’ll price match deals you can find elsewhere, and they've got their own offers too. These include 20% off Barbour, 20% off handbags and up to 50% off its home and garden range. AsdaThis supermarket is refusing to take part in Black Friday this year, claiming its customers prefer year-round discounts and bargains. However, they've just dropped petrol prices below a pound for the weekend.