I've just had my second c section, and was sent home the day after (about 24 hours post surgery). I'd suggest the following:
-ask for soluble/internal stitches so there's no stitch removal to contend with (standard in some hospitals but not others AFAIK)
-If you can, stay in hospital a bit longer. Even an extra day will really help, getting up the stairs to bed on that first night home nearly killed me and I was in a lot of pain. It reduced pretty quickly though. My hospital would have let me stay if I wanted to and I think this would be particularly true if you are on your own - I got the distinct feeling that several of the midwives felt the new next day release was a bit quick so I doubt they'd argue at all with you staying an extra night or so. I had dh at home thankfully but I wouldn't have come home otherwise. First c section I was in for 2 nights and than extra night made a difference.
-Standing up from a seated/lying position whilst holding the baby is very difficult to begin with, so think carefully about where you'll sit with him/her and have something nearby to sit/lie them on if necessary while you get up.
-First few days getting up from a sofa or bed is really, really hard work. If you have a decent armchair make use of it as the extra leverage helps. Ditto bed - I hoisted myself up using my metal headboard! If your bed is high (mines 70cm) have a step there to help you get in and out.
-Have some ready made formula in. If you're planning to FF then you don't want to be pissing about trying to calm a hungry baby and make a bottle when you can barely stand. If you're planning to BF great, but it's worth having the backup especially as you can't nip out to get it so in that case maybe get one of the little starter packs. Personally, I planned to FF and did ...until day 4 when my milk came in and my baby had unexpectedly read the manual and latched on herself. I'm now pretty much exclusively breastfeeding, so I'd say...
-don't give yourself a hard time if you need some formula while you get going (if you plan to BF), your body is going to go through a big operation and recovery and IME formula in the early days post section won't necessarily mean you can't go on to BF. But you need to recover too.
-watch for infection. My dressing was removed on day 3, day 10 was midwife's last visit...day 13 I got an infection. You might well not be able to see your wound (thanks to erm...excess skin!) so either get someone to check it for you or try using a hand mirror or something. Make sure you dry it very thoroughly (pat it!) after showering, I'd suggest using something non fluffy like kitchen paper.
-cosleeping was a huge help to me in the early days which wasn't the plan but being able to just settle baby with minimal movement was helpful. I got DH to do the nappy changes but as you are on your own I'd do what I did in the hospital and change night time nappies on your bed if possible to save you getting up and down more than necessary.
-You might need something to lean/pull on to get up from the loo in the first few days as that's surprisingly hard when your stomach muscles are shot. If there's nothing close to your loo then move a chair or something in.
-big, high waisted pants! Debenhams do some good cotton ones in a pack of 5
-I managed to go out with the pram about day 4 or 5, but plan route with care as any steps or hills are a challenge
-get family/friends to do stuff like hoovering and laundry as the pushing (hoover) and bending (laundry) are really hard and bloody painful.
-Take your painkillers!
and generally try not to push yourself, I'd agree there will be times when you feel great (or at least OK) but it takes remarkably little in the early days to knock the stuffing out of you.