Do not wear them when sleeping or browsing the computer.
WHen you sleep with them, there is a decent chance for you to have swollen eyes, and if you use them to browse the PC or something for a long time, your eyes might get worse.
You can shower with them, as long as the lenses don't get in contact with the water.
Unless specified by your optometrist or brand, I would not recommend sleeping in your contacts.
That being said, I wear Acuvue Oasys contacts and sleep in them quite frequently. If anything, I'll have slight discomfort in the morning due to dryness. If you do decide to sleep in yours, I suggest you remove and rinse them at least every 3-4 days.
I am not an optometrist, so take this with a grain of salt.