Mate you got 2 options, I alternate these depending on my mood:

1. Sit on a bench with some mates and get high. You could do this on ya larry if cirumstances do not permit this :-(
2. If you wanna relax folow my instructions.

1.Prepeare spliff and lighter in draw.
2. Wait for parents to go to sleep.
3. Wait another hour, play on the computer or something.
4. Quietly turn off the lights take out ya zoot.
5. Open the window, turn on some nice quiet trippy music, i recomend a bit of orbital.
6. lean out and toke up

Sorted

Man if your walking around on the street on your own high as a kite theres something wrong. If you do it on your on make it a therapeutic thing, dont be a loser.