Over the last few years I've gone out of my way to perform extensive research on the best methods for getting a good night's sleep when confined to a single seat. Here are my notes on a few cosy positions.
The Nodding Dog
Level of flexibility required: Beginner
Length of uninterrupted sleep achievable: 10 minutes
Annoyance to neighbours: Minimal
The Ballerina
Level of flexibility required: Advanced
Length of uninterrupted sleep achievable: 30 minutes
Annoyance to neighbours: High
The Slattern
Level of flexibility required: Intermediate
Length of uninterrupted sleep achievable: 20 minutes
Annoyance to neighbours: Moderate
The Awkward Foetus
Level of flexibility required: Intermediate
Length of uninterrupted sleep achievable: 30 minutes
Annoyance to neighbours: Moderate
The Bracket
Level of flexibility required: Beginner
Length of uninterrupted sleep achievable: 15 minutes
Annoyance to neighbours: Minimal
The Ball of String
Level of flexibility required: Intermediate
Length of uninterrupted sleep achievable: 30 minutes
Annoyance to neighbours: High
The Coy Magpie
Level of flexibility required: Beginner
Length of uninterrupted sleep achievable: 20 minutes
Annoyance to neighbours: Moderate
I personally find that if a routine for alternating these positions is firmly in place, you can get a few hours of barely interrupted sleep at a time. If you are travelling in less crowded conditions, the best position to take is The Prima Donna, which involves stretching out over as many seats as possible. I hope that this handy guide enriches your travel experience.