Take your time Hamlet.
Congrats to you (& any others) who got their results today.
Agree with earlier posters - I found A levels to be the hardest thing ever. Part of me thinks that the jump from GCSE to A level is part of the problem.
Regarding university, like sam I stayed local. For similar reasons too, though I do kinda wish I'd gone away, another part of me wonders whether I'd have had the self-discipline to make it through the degree.
Two tips I'd give -
1) don't get into any habit of missing lectures/seminars etc. It becomes to easy to make a habit of it & you'll miss so much!
2) treat it as full time. You might only be in lectures 9-12 hours a week. If so, spend 20-30 hours a week reading, researching, planning essays etc. In the first year, you might be able to get away (just) by knocking out a 1000 word essay the night before. That won't happen in years 2 & 3!
Year 1 felt for me like I was stood on top of a cliff, & was relatively easily manageable.
Year 2 felt like I was hanging off that cliff with 2 arms.
Year 3 had such complex study that at times I really wasn't sure I understood it. I felt like I was hanging onto that cliff edge by 1, maybe 2 fingernails.